Error prototype for does not match any in class

Hi, New to c++ and have an error that I cannot resolve. Thinking I've just made a very basic mistake and cannot see it. The error is 'prototype f
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  1. 04-07-2021


    #1

    ScottChegg is offline


    Registered User

    Question Prototype for » does not match any in class error

    Hi,

    New to c++ and have an error that I cannot resolve. Thinking I’ve just made a very basic mistake and cannot see it.

    The error is «prototype for ‘void Menu::newItem(std::string, std::string, int)’ does not match any in class ‘Menu'»

    I am certain they match, all similar stack overflow questions were trying to pass too many variables or had different return types which is why this seems so strange.

    menu.h

    Code:

    #ifndef MENU_H
#define MENU_H


#include <string>
using std::string;
#include <iostream>
#include "item.h"
//#define MAXLEN 20


class Menu {
private:
        string _fName;
        string _mName;
        Item _db[20]; 
        int _nElems;
public:
        Menu(string mName) : _fName(""), _mName(mName), _nElems(0) {  };
       
        void newItem(string category, string description, int price);
        
        void display();
        
};
#endif

    menu.cpp

    Code:

    #include "menu.h"
#include <string>
using std::string;
#include <iostream>
using std::cout;
using std::endl;




void Menu::newItem(string category, string description, int price){
        _db[_nElems] = Item(category, description, price);
        _nElems++;
}


void Menu::display(){
        string div = 
        "+--+-------+---------------------------------+-----+n";
        cout << div <<
        "|No|Cat.   |Description                      |Price|n" << div;
        for(int i = 0; i < _nElems; i++) {
                _db[i].display(i);
        }
        cout << div;
}

    Any help would be greatly appreciated!

  2. 04-07-2021


    #2

    laserlight is offline


    C++ Witch

    laserlight's Avatar

    You’re right: they match.

    It may make no difference, but I suggest that you remove the using declaration from the header file: fully qualify std::string there instead. In the source file, move the using declaration to after the last header inclusion. The reason is that using declarations at file scope in a header can change the meaning of code in the files that include the header, and using declarations before a header can change the meaning of code in the included header.

    Other things to tell us: which line does the error reference? What’s in item.h?

    Last edited by laserlight; 04-07-2021 at 04:42 AM.

    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)

    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. «Finding the smallest program that demonstrates the error» is a powerful debugging tool.

    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. 04-07-2021


    #3

    ScottChegg is offline


    Registered User

    Unfortunately your suggestions made no difference.

    Quote Originally Posted by laserlight
    View Post

    Other things to tell us: which line does the error reference? What’s in item.h?

    in menu.cpp:

    Code:

     void Menu::newItem(std::string category, std::string description, int price){

    and in menu.h ([ERROR] candidate is: void Menu::newItem()):

    Code:

             void newItem(std::string category, std::string description, int price);

  4. 04-07-2021


    #4

    Salem is offline


    and the hat of int overfl

    Salem's Avatar

    Which compiler/IDE are you using?

  5. 04-07-2021


    #5

    ScottChegg is offline


    Registered User

    Quote Originally Posted by Salem
    View Post

    Which compiler/IDE are you using?

    Dev C++

  6. 04-07-2021


    #6

    Salem is offline


    and the hat of int overfl

    Salem's Avatar

    Are you talking about the archaic «Bloodshed» Dev-C++ or the somewhat up to date «Orwell» Dev-C++.

    Because the bloodshed one is about 20 years out of date.

    Dev-C++ download | SourceForge.net

  7. 04-07-2021


    #7

    ScottChegg is offline


    Registered User

    I’m embarrassed to say the bloodshed one. It has been pushed quite heavily on my course. Will see if the code compiles on another IDE now.

    EDIT: I’m actually using the version linked above.

    Last edited by ScottChegg; 04-07-2021 at 06:22 AM.

  8. 04-07-2021


    #8

    Salem is offline


    and the hat of int overfl

    Salem's Avatar

    You’re using the Orwell one and it doesn’t work?

    I commented out Item (not that it should matter for the purpose of the exercise), and it compiles just fine here

    Code:

    $ cat menu.h
#ifndef MENU_H
#define MENU_H
 
 
#include <string>
using std::string;
#include <iostream>
//#include "item.h"
//#define MAXLEN 20
 
 
class Menu {
private:
        string _fName;
        string _mName;
        //Item _db[20]; 
        int _nElems;
public:
        Menu(string mName) : _fName(""), _mName(mName), _nElems(0) {  };
        
        void newItem(string category, string description, int price);
         
        void display();
         
};
#endif
$ cat menu.cpp
#include "menu.h"
#include <string>
using std::string;
#include <iostream>
using std::cout;
using std::endl;
 
 
 
 
void Menu::newItem(string category, string description, int price){
        //_db[_nElems] = Item(category, description, price);
        _nElems++;
}
 
 
void Menu::display(){
        string div = 
        "+--+-------+---------------------------------+-----+n";
        cout << div <<
        "|No|Cat.   |Description                      |Price|n" << div;
        for(int i = 0; i < _nElems; i++) {
                //_db[i].display(i);
        }
        cout << div;
}
$ g++ -c menu.cpp

  9. 04-08-2021


    #9

    ScottChegg is offline


    Registered User

    Quote Originally Posted by Salem
    View Post

    You’re using the Orwell one and it doesn’t work?

    I commented out Item (not that it should matter for the purpose of the exercise), and it compiles just fine here

    Yes, definitely using Orwell version 5.11.

    I also managed to get the code to compile today by moving the menu constructor out of the header file. Not sure how this error occurred and I’m not sure why it has gone away.

    If I had to guess I’d say the error occurred as I updated the newItem function and the compiler still expected to see the old parameters? Still, I don’t think this explains why it disappeared today once I moved the constructor.

    Regardless thanks for the help!

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    msm.ru

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    Помоги проекту!

    >
    Проблема с классом
    , Класс в отдельном файле компилируется с ошибкой

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    Сообщ.
    #1

    ,
    03.11.12, 08:24

      Здравствуйте!
      Пытаюсь объявить класс в отдельном файле, но при компиляции получаю ошибку.

      ExpandedWrap disabled

        //main.cpp

        #include «test.h»

        #include <iostream>

        int main()

        {

            Test_class test;

            test.message();

            test.message2();

            test.message3();

            system(«pause»);

        }

      ExpandedWrap disabled

        //test.cpp

        #include <iostream>

        using namespace std;

        #include «test.h»

        Test_class::message()

        {

            cout << «Message number 1» << endl;

        }

        Test_class::message2()

        {

            cout << «Message number 2» << endl;

        }

        Test_class::message3()

        {

            cout << «Message number 3» << endl;

        }

      ExpandedWrap disabled

        //test.h

        class Test_class

        {

            public:

                void message();

                void message2();

                void message3();

        };

      Компилирую в dev c++
      Ошибка:
      prototype for `int Test_class::message()’ does not match any in class `Test_class’

      А если сделать в таком варианте всё работает:

      ExpandedWrap disabled

        //main.cpp

        #include «test.h»

        #include <iostream>

        int main()

        {

            Test_class test;

            test.message();

            test.message2();

            test.message3();

            system(«pause»);

        }

      ExpandedWrap disabled

        //test.h

        #include <iostream>

        using namespace std;

        class Test_class

        {

            public:

                void message()

                {

                    cout << «Message number 1» << endl;

                }

                void message2()

                {

                    cout << «Message number 2» << endl;

                }

                void message3()

                {

                    cout << «Message number 3» << endl;

                }

        };

      Adil



      Сообщ.
      #2

      ,
      03.11.12, 08:45

        Цитата Fe_DoS @ 03.11.12, 08:24

        ExpandedWrap disabled

          //test.cpp

          #include <iostream>

          using namespace std;

          #include «test.h»

          Test_class::message()

          {

              cout << «Message number 1» << endl;

          }

          Test_class::message2()

          {

              cout << «Message number 2» << endl;

          }

          Test_class::message3()

          {

              cout << «Message number 3» << endl;

          }

        тип возвращаемых значений — void’ы — то допиши к методам


        Fe_DoS



        Сообщ.
        #3

        ,
        03.11.12, 09:07

          Adil, я исправил test.cpp, но теперь появилась другая ошибка.
          multiple definition of `Test_class::message()’


          Adil



          Сообщ.
          #4

          ,
          03.11.12, 09:18

            Ну так test.h у тебя, наверно, от второго варианта остался. Сделай его как в первом варианте — просто объявления методов.


            Fe_DoS



            Сообщ.
            #5

            ,
            03.11.12, 09:33

              Сейчас код имеет такой вид:

              ExpandedWrap disabled

                //main.cpp

                #include «test.h»

                #include <iostream>

                int main()

                {

                    Test_class test;

                    test.message();

                    test.message2();

                    test.message3();

                    system(«pause»);

                }

              ExpandedWrap disabled

                //test.cpp

                #include <iostream>

                using namespace std;

                #include «test.h»

                void Test_class::message()

                {

                    cout << «Message number 1» << endl;

                }

                void Test_class::message2()

                {

                    cout << «Message number 2» << endl;

                }

                void Test_class::message3()

                {

                    cout << «Message number 3» << endl;

                }

              ExpandedWrap disabled

                //test.h

                class Test_class

                {

                    public:

                        void message();

                        void message2();

                        void message3();

                };

              при этом вылетают ошибки:
              multiple definition of `Test_class::message()’
              first defined here
              multiple definition of `Test_class::message2()’
              first defined here
              multiple definition of `Test_class::message3()’
              first defined here
              ld returned 1 exit status
              [Build Error] [test.exe] Error 1

              Adil



              Сообщ.
              #6

              ,
              03.11.12, 11:31

                Где-то ты меня или себя обманываешь. Должно собираться.


                Fe_DoS



                Сообщ.
                #7

                ,
                03.11.12, 11:56

                  Проблема решилась, но причина так и осталась для меня загадкой.
                  Я создал новый проект, но класс и методы писал не вручную, а добавил их на вкладке классы и получил код:

                  ExpandedWrap disabled

                    //main.cpp

                    #include <conio.h>

                    #include «test_class.h»

                    #include <iostream>

                    using namespace std;

                    int main()

                    {

                        Test_class test;

                        test.message();

                        test.message2();

                        test.message3();

                        system(«pause»);

                    }

                  ExpandedWrap disabled

                    //test_class.cpp

                    // Class automatically generated by Dev-C++ New Class wizard

                    #include «test_class.h» // class’s header file

                    #include <iostream>

                    using namespace std;

                    // No description

                    void Test_class::message()

                    {

                        cout << «Message number 1» << endl;

                    }

                    // No description

                    void Test_class::message2()

                    {

                        cout << «Message number 2» << endl;

                    }

                    // No description

                    void Test_class::message3()

                    {

                        cout << «Message number 3» << endl;

                    }

                  ExpandedWrap disabled

                    //test_class.h

                    // Class automatically generated by Dev-C++ New Class wizard

                    #ifndef TEST_CLASS_H

                    #define TEST_CLASS_H

                    /*

                     * No description

                     */

                    class Test_class

                    {

                        public:

                            // No description

                            void message3();

                            // No description

                            void message2();

                            // No description

                            void message();

                    };

                    #endif // TEST_CLASS_H

                  Всё работает, а первый вариант продолжает выдавать ошибку…
                  Вывод: Dev C++ в корзину.


                  Kray74



                  Сообщ.
                  #8

                  ,
                  03.11.12, 12:20

                    В первом случае не было include guard в test.h


                    Adil



                    Сообщ.
                    #9

                    ,
                    03.11.12, 12:40

                      Сходу собрался первый вариант в 2008ой студии, без include guard. Да и нужны эти guard’ы только на этапе компиляции, их отсутствие не должно приводить к ошибке при линковке.


                      Fe_DoS



                      Сообщ.
                      #10

                      ,
                      03.11.12, 12:40

                        Да, но и без include guard должно работать.

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                        ----------------------------------------bspline.cc--------------------------------------------
 
#include "message.h"
#include "parametermap.h"
#include "constants.h"
#include "utils.h"
#include "linalg.h"
#include "lsqrinvert.h"
#include "bspline_imager1d.h"
 
using namespace TNT;
using namespace std;
 
#define __USE_GSL__
 
#define __IMAGER_EPSILON 1e-10
#define __TYPICAL_SOURCE_SCALE__ 1e-4 //in fm^-3
 
 
//---------------- Read ----------------------------
bool CBasisSplineImager1d::Read( const parameterMap& m ){
 
    CBasisFuncImager1d::Read( m );
    qscale                      = parameter::getD(m,"qscale",50.);
//    spline_degree               = parameter::getI(m,"spline_degree",3);
    knot_tolerance              = parameter::getD(m,"knot_tolerance",1e-2);
    knot_init_scheme            = parameter::getS(m,"knot_init_scheme","default");
    optimize_knots              = parameter::getB(m,"optimize_knots",false);
    if (optimize_knots) {
        optimize_knots_max_iter                 = parameter::getB(m,"optimize_knots_max_iter",optimize_knots_max_iter);
        optimize_knots_minimizer_func_weight    = parameter::getB(m,"optimize_knots_minimizer_func_weight",optimize_knots_minimizer_func_weight);
        optimize_knots_coellesce_knot_tol       = parameter::getB(m,"optimize_knots_coellesce_knot_tol",optimize_knots_coellesce_knot_tol);
        optimize_knots_simplex_min_size         = parameter::getB(m,"optimize_knots_simplex_min_size",optimize_knots_simplex_min_size);
    }
    vector< double > empty_vec(0);
    if (knot_init_scheme == "user_defined_collocation_points") {
        colloc_pts = parameter::getV(m,"user_collocation_points",empty_vec);
    }
    if (knot_init_scheme == "user_defined_knots") {
        user_knots = parameter::getV(m,"user_knots",empty_vec);
    }
    return true;
}
 
//--------------- Write -----------------------------
// not used much except for diagnostics, so write everything!
bool CBasisSplineImager1d::Write( parameterMap& m ){
 
    CBasisFuncImager1d::Write( m );
    parameter::set(m,"qscale",qscale);
//    parameter::set(m,"spline_degree",spline_degree);
    parameter::set(m,"knot_tolerance",knot_tolerance);
    parameter::set(m,"knot_init_scheme",knot_init_scheme);
    parameter::set(m,"optimize_knots",optimize_knots);
    parameter::set(m,"optimize_knots_max_iter",optimize_knots_max_iter);
    parameter::set(m,"optimize_knots_minimizer_func_weight",optimize_knots_minimizer_func_weight);
    parameter::set(m,"optimize_knots_coellesce_knot_tol",optimize_knots_coellesce_knot_tol);
    parameter::set(m,"optimize_knots_simplex_min_size",optimize_knots_simplex_min_size);
    parameter::set(m,"user_collocation_points",colloc_pts);
    parameter::set(m,"user_knots",user_knots);
    return true;
}
    
//---------------- convertCorrelationToSource ----------------------------
//! function that manages the imaging
[B]"!!!!!"[/B]
bool CBasisSplineImager1d::convertCorrelationToSource( const CCorrFtn1dHisto& corrin, CSourceFtnBase& souout, const parameterMap& m ){
 
    CBasisSpline1d* souPtr = dynamic_cast<CBasisSpline1d*>(&souout);
    if (souPtr==NULL) throw MESSAGE<<"Source argument must derive from CBasisSpline1d"<<ENDM_FATAL;
    bool result = CBasisFuncImager1d::convertCorrelationToSource( corrin, souout, m );
    if (optimize_knots && result) do_optimal_knots( *souPtr ); 
    return result;
}
 
//---------------- convertSourceToCorrelation ----------------------------
//! function that manages the unimaging
[B]"!!!!!"[/B]
bool CBasisSplineImager1d::convertSourceToCorrelation( const CSourceFtnBase& souin, CCorrFtn1dHisto& corrout, const parameterMap& m ){
 
    return CBasisFuncImager1d::convertSourceToCorrelation( souin, corrout, m );
}
 
//--------------------- imageit ---------------------------
//! Code to image a 1d source, with equality constraints
double CBasisSplineImager1d::imageit(CBasisFunctionExpansion1d& souout){
 
    CBasisSpline1d* souPtr = dynamic_cast<CBasisSpline1d*>(&souout);
    if (souPtr==NULL) throw MESSAGE<<"Source argument must derive from CBasisSpline1d"<<ENDM_FATAL;
 
    // Image using the generic code or optimize knots
    double chi2 = CBasisFuncImager1d::imageit( *souPtr );
 
    // Compute final summed relative error of source (to emulate old "optimal knot" behavior)
    double relerr=0.0;
    for (int i=0;i<souout.ndata;++i){relerr+=abs(souout.data[i]/sqrt(souout.covmtx[i][i]));}
    
    // Compute the "figure of merit" that we'll minimize when doing the optimal knots
    return chi2 + optimize_knots_minimizer_func_weight * relerr;
}
 
//-------------------- do_optimal_knots ----------------------------
double CBasisSplineImager1d::do_optimal_knots(CBasisSpline1d& souout){
#ifdef __USE_GSL__
 
    // don't have to set souWork because we already ran imageit once
    // souWork.CopyState(souout);
 
    /* variable declarations */
    cout << "  Performing knot optimization"<<endl;
    size_t nVarKnots = ndata_sou-(spline_degree+1);
    const gsl_multimin_fminimizer_type *T = gsl_multimin_fminimizer_nmsimplex;
    gsl_multimin_fminimizer *s = NULL;
    gsl_vector *ss, *x;
    gsl_multimin_function minex_func;
    size_t iter = 1, i;  // we already ran imageit once, so set iter to 1
    int status;
    double size;
 
    /* Initial vertex size vector */
    ss = gsl_vector_alloc (nVarKnots);
 
    /* Set all step sizes to ?? */
    double dxKnots=(rmax)/(nVarKnots+1);
    gsl_vector_set_all (ss, 0.75*dxKnots);
 
    /* Starting point */
    x = gsl_vector_alloc (nVarKnots);
    for (unsigned int i=0;i<nVarKnots;++i) gsl_vector_set(x, i, souout.knots[i+spline_degree+1]);
    cout << "    Variable knots initialized"<<endl;
 
    /* Initialize method */
    minex_func.f = &static_imageit;
    minex_func.n = nVarKnots;
    minex_func.params = (void *)this;
    s = gsl_multimin_fminimizer_alloc (T, nVarKnots);
    gsl_multimin_fminimizer_set (s, &minex_func, x, ss);
    cout << "    Simplex minimizer initialized"<<endl;
 
    /* Iterate */
    do {
        iter++;
        status = gsl_multimin_fminimizer_iterate(s);
      
        if (status) break;
 
        size = gsl_multimin_fminimizer_size (s);
        status = gsl_multimin_test_size (size, 1e-2);
 
        if (status == GSL_SUCCESS) printf ("converged to minimum atn");
 
        printf ("%5d ", int(iter));
        for (i = 0; i < nVarKnots; i++) printf ("%12.5e ", gsl_vector_get (s->x, i));
        
        printf ("f() = %7.3f size = %.3fn", s->fval, size);
    } while (status == GSL_CONTINUE && iter < 200);
    
    gsl_vector_free(x);
    gsl_vector_free(ss);
    gsl_multimin_fminimizer_free (s);
 
    souout.CopyState(souWork);
    return (double)(status);
 
#else
 
    return imageit(souout);
 
#endif
}
 
//-------------------- static_imageit ----------------------------
//! Wrapper to imageit that we can use to do optimization
//! using GSL.  Also, recomputes losource's knots using
//! the variable knots in variableKnots, handed to this
//! routine by the gsl minimizer
double CBasisSplineImager1d::static_imageit(const gsl_vector *variableKnots, void* classPtr){
 
#ifdef __USE_GSL__
    CBasisSplineImager1d *cls = (CBasisSplineImager1d*)classPtr;
 
    // compute number of knots we can vary.  if this doesn't match the 
    // dimensions of variableKnots, we are screwed
    int nVarKnots=cls->ndata_sou-(cls->spline_degree+1);
 
    // set the knots 
    vector<double> myKnots(cls->ndata_sou+cls->spline_degree+1);
    for (int i=0;i<cls->spline_degree+1;++i) {
        myKnots[i]=cls->rmin;
        myKnots[cls->ndata_sou+cls->spline_degree-i]=cls->rmax;
    }
    for (int i=0;i<nVarKnots;++i) {
        while( (myKnots[cls->spline_degree+1+i]>cls->rmax) || (myKnots[cls->spline_degree+1+i]<cls->rmin) ) {
            myKnots[cls->spline_degree+1+i] =
                mod( abs(gsl_vector_get(variableKnots,i)), cls->rmax-cls->rmin ) + cls->rmin;
        }
    }
    sort(myKnots.begin(),myKnots.end());
    
    // Redimension souWork to accomodate the new knots
    cls->souWork.setDim( myKnots.size() - cls->souWork.spline_degree - 1 );
 
    // Now put in the new knots
    cls->souWork.knots = stl2tntVec(myKnots);
 
    // re-build the Kmtx
    parameterMap dummyMap;
    cls->set_kmtx(cls->corrwork,cls->souWork,dummyMap);
    
    // Now image the source.  
    return cls->imageit(cls->souWork); 
 
#else
 
    return 0.;
 
#endif
 
}
 
//------------------ set_knots --------------------------
//! master knot initializer routine
void CBasisSplineImager1d::set_knots(CBasisSpline1d& souout){
 
    // figure out if we have to use the default scheme instead of alternate
    if (knot_init_scheme=="sampling_thm") {
        if (spline_degree == 0){
            MESSAGE << "Requesting Spline degree = 0, so using default knotsn" <<ENDM_WARN;
            knot_init_scheme="default";
            ndata_sou=std::max(std::min(ndata_corr,ndata_sou),spline_degree+1);
        } 
        else if (kernel_particle1!=kernel_particle2){
            MESSAGE << "Sampling theorem doen't work on unlike pairs" <<ENDM_WARN;
            knot_init_scheme="default";
        } 
    }
 
    // these two make knots directly
    if (knot_init_scheme=="default") 
        set_knots_default(souout);
    else if (knot_init_scheme=="user_defined_knots") 
        set_knots_user_defined(souout);
    // these two make collocation points which must be converted to knots
    else if (knot_init_scheme=="sampling_thm") {
        set_colloc_sampling_thm();
        set_knots_from_colloc_points(souout);
    }
    else if (knot_init_scheme=="user_defined_collocation_points") 
        set_knots_from_colloc_points(souout);
    // default to this one
    else 
        set_knots_default(souout);
}
 
//------------------- set_knots_default -------------------------
void CBasisSplineImager1d::set_knots_default( CBasisSpline1d& souout ){
 
    cout << "  Default source knot initializationn";
    // make a temp spline w/ correct dimensions, copy temp bspline into working source
    ndata_sou=std::min(static_cast<int>(ndata_corr/1.5),souout.ndata); //override if ndata_out unreasonable
    if (ndata_sou != souout.ndata){
        MESSAGE << "Number of coefficients requested is too big, lowering to "<<ndata_sou<<ENDM_WARN;
        souout.setDim( ndata_sou );
    }
    rmin = souout.xmin;
    rmax = souout.xmax;
    souout.setDefaultKnots();
}
 
//------------------- set_colloc_sampling_thm -------------------------
void CBasisSplineImager1d::set_colloc_sampling_thm( void ){
 
    static int maxnumzeros=40;
 
    cout << "   Using Sampling theorem to guess collocation pointsn";
    cout << "       Getting zeroes from kerneln";
    
    // get true zeros of wavefunction for collocation points
    vector<double> zeros(get_zeros(qscale,maxnumzeros,l));
 
    // make temp list ot r collocation points
    vector<double> tmp_rcolloc(1,rmin);
 
    // prune list of zeros to get only collocation points w/ r < _rmax
    for (int i=0;i<static_cast<int>(zeros.size());i++) {
        if ((zeros[i]<rmax)&&(zeros[i]>rmin)) tmp_rcolloc.push_back(zeros[i]);
    }
 
    // add last element
    tmp_rcolloc.push_back(rmax);
 
    // make sure list sorted
    sort(tmp_rcolloc.begin(),tmp_rcolloc.end());
 
    // save the collocation points
    colloc_pts = tmp_rcolloc;
}
 
//------------------- set_knots_from_colloc_points -------------------------
void CBasisSplineImager1d::set_knots_from_colloc_points( CBasisSpline1d& souout ){
 
    cout << endl;
    cout << "    Converting collocation points into knotsn";
    cout << "    Pre-thin collocation points:n";
    for (int i=0;i<static_cast<int>(colloc_pts.size());++i){
        cout <<"        "<< i << " " << colloc_pts[i]<<endl;
    }
 
    // thin tmp_rcolloc
    vector<double> rcolloc(1,colloc_pts[0]);
    int nave=1;
    for (int i=1;i<static_cast<int>(colloc_pts.size());++i) {
        if (abs(colloc_pts[i]-rcolloc.back())<knot_tolerance) {
            rcolloc.back() = (nave/(nave+1))*(rcolloc.back()+colloc_pts[i]/nave);           
            nave++;
        } else {
            rcolloc.push_back(colloc_pts[i]);
            nave=1;
        }
    }
    cout << "    Post-thin collocation points:n";
    for (int i=0;i<static_cast<int>(rcolloc.size());i++){
        cout << "        "<<i << " " << rcolloc[i]<<endl;
    }
    
    // create a temp bspline and set the optimal knots using the collocation points above
    souout.setOptimalKnots(stl2tntVec(rcolloc));
    // Since bspline knot setup may override the number of coefficients 
    // (we may have asked for unreasonable number), we need to reset ndata_out
    ndata_sou = souout.ndata;
}
 
//------------------- set_knots_user_defined -------------------------
void CBasisSplineImager1d::set_knots_user_defined( CBasisSpline1d& souout ){
 
    // copy temp bspline into working source
    souout.setDim(user_knots.size()-souout.spline_degree-1);
    // set the knots 
    souout.knots = stl2tntVec(user_knots);
    // Since bspline knot setup may override the number of coefficients 
    // (the user may have botched to knots/coeffs count), 
    // we need to reset ndata_out
    ndata_sou = souout.ndata;
}
 
//------------------- set_no_data -------------------------
[B]"!!!!!"[/B]
void CBasisSplineImager1d::set_no_data( CSourceFtnBase& souout ){
 
    CBasisFuncImager1d::set_no_data( souout );
    CBasisSpline1d* souPtr = dynamic_cast<CBasisSpline1d*>(&souout);
    if (souPtr==NULL) throw MESSAGE<<"Source argument must derive from CBasisSpline1d"<<ENDM_FATAL;
    souPtr->setDefaultKnots(); // will give 0 everywhere outside this range anyway
}
 
//------------------- initialize_source -------------------------
[B]"!!!!!"[/B]
void CBasisSplineImager1d::initialize_source( const CCorrFtn1dHisto& corrin, CSourceFtnBase& souout, const parameterMap& m ){
 
    CBasisFuncImager1d::initialize_source(corrin,souout,m);
    CBasisSpline1d* souPtr = dynamic_cast<CBasisSpline1d*>(&souout);
    if (souPtr==NULL) throw MESSAGE<<"Source argument must derive from CBasisSpline1d"<<ENDM_FATAL;
    souPtr->Read(m);
    spline_degree=souPtr->spline_degree;
    set_knots(*souPtr);
}
 
//----------------- get_zeros ---------------------------
//!  Get list of first nZeros zeros for l<=lmax=rmax*q/hbarc
vector< double > CBasisSplineImager1d::get_zeros(double q, int nZeros, int l, double eps){
 
    vector<double> zeros;
    
    // if I did this right, this should be smaller than the spacing between any zeros
    double xstep=0.5/(2.0*q/HBARC);  
    
    double xmin = eps;
    double testlo;
    double testhi;
    
    zero_struct azero;
    
    while (static_cast<int>(zeros.size())<nZeros){
        testlo  = kernelPtr->GetValue(l,q,xmin); 
        testhi  = kernelPtr->GetValue(l,q,xmin+xstep);
 
        // Make sure lower point isn't a zero
        if ( abs(testlo) <= eps ) { 
            zeros.push_back(xmin);
            xmin+=xstep/2.0;
            
        } else {
 
            // Make sure upper point isn't a zero
            if ( abs(testhi) <= eps ) { 
                testlo  = kernelPtr->GetValue(l,q,xmin);
                testhi  = kernelPtr->GetValue(l,q,xmin+xstep/2.0);
            }
 
            // OK, now look for zeros on the current interval
            if ( testlo*testhi <= 0.) {
                azero=find_zero(xmin,xmin+xstep,q,l,eps);
                if (azero.iszero) zeros.push_back(azero.result);
            }
        }
        
        // ready for next step just past this zero
        xmin+=xstep;
    }
    return zeros;
}
 
//------------------- find_zero ------------------------
//!  Gets first zero between xmin & xmax, 
//!  starting at xmin.  l and q are fixed. 
zero_struct CBasisSplineImager1d::find_zero(double xmin, double xmax, double q, int l, double eps){
    int nsteps=10;
    double stepsize=(xmax-xmin)/nsteps,xleft,xright;
    zero_struct ans;
    for (int i=0;i<nsteps;++i){
        xleft=xmin+i*stepsize;
        xright=xleft+stepsize;
        if (kernelPtr->GetValue(l,q,xleft)*kernelPtr->GetValue(l,q,xright)<=0.){ // is sign change
            if (abs(xleft-xright)<eps) {
                ans.iszero = true;
                ans.result = (xleft+xright)/2.;
                return ans;
            }
            else return find_zero(xleft,xright,q,l,eps);
        }
    }
    
    // never get here, unless is no zero
    ans.result=rmax; 
    ans.iszero=false; 
    return ans; 
}
                        Источник
                        • Forum
                        • Beginners
                        • Don’t know what I’m doing wrong

                        Don’t know what I’m doing wrong

                        I am prompted to make a class named «secretType» in which it must include private variables: name of type string, height of type double and age and height of type int. I must also include public member functions:
                        print — outputs the data stored in the member variables with the appropriate titles

                        setName — function to set the name

                        setAge — function to set the age

                        setWeight — function to set the weight

                        setHeight — function to set the height

                        getName — value-returning function to return the name

                        getAge — value-returning function to return the age

                        getWeight — value-returning function to return the weight

                        getHeight — value-returning function to return the height

                        and a constructor with default parameters.

                        It seems to me like I have done everything properly, but I get countless errors when compiling stating that the prototypes and candidates are not the same, for example:
                        «[Error] prototype for ‘void secretType::setHeight(int)’ does not match any in the class ‘secretType’.»
                        «[Error] candidate is: void secretType::setHeight(double)»

                        Yet I didn’t declare setHeight as an int, I clearly declared it as a double 

                         
                        		 
                        void setHeight(double height);

                        I don’t know what I’m doing wrong. Any help would be appreciated.

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                        #include <iostream>
#include <string>

using namespace std;

class secretType {
	
	public:
		
		// Constructor including parameters
		secretType(string = " ", int = 0, int = 0, double = 0);
		void print() const; // Prints for testing
		void setName(string name);
		void setAge(int age);
		void setWeight(int weight);
		void setHeight(double height);
		string getName()const;
		int getAge()const;
		int getWeight()const;
		double getHeight()const;
		
	private:
		
		string name;
		int age, weight;
		double height;
	
};

// Creates member function definitions
void secretType::print() const {
	
	cout << "Name: " << name << endl;
	cout << "Age: " << age << endl;
	cout << "Weight: " << weight << endl;
	cout << "Height: " << height << endl;
	
}

void secretType::setAge(int a) {
	
	age = a;
	
}

void secretType::setName(string n) {
	
	name = n;
	
}

void secretType::setWeight(int w) {
	
	weight = w;
	
}

void secretType::setHeight(int h) {
	
	height = h;
	
}

void secretType::getName()const {
	
	return name;
	
}

void secretType::getAge()const {
	
	return age;
	
}

void secretType::getWeight()const {
	
	return weight;
	
}

void secretType::getHeight()const {
	
	return height;
	
}

// Main program to test
int main() {
	
	secretType secretObject; // Creates an object to test
	secretObject.setName("Margaret Smith");
	secretObject.setAge(34);
	secretObject.setWeight(156);
	secretObject.setHeight(62);
	secretObject.print();
	
	system("PAUSE");
	return 0;
	
}
                        		 

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                        void secretType::setHeight(int h) {   // that's not a double!
	height = h;
}

                        Last edited on

                        Thank you tpb, I overlooked that, but it’s still giving me me errors. Here’s all of them (it’s a lot):

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                        [Error] prototype for 'void secretType::getName() const' does not match any in class 'secretType'
[Error] candidate is: std::string secretType::getName() const
[Error] prototype for 'void secretType::getAge() const' does not match any in class 'secretType'
[Error] candidate is: int secretType::getAge() const
[Error] prototype for 'void secretType::getWeight() const' does not match any in class 'secretType'
[Error] candidate is: int secretType::getWeight() const
[Error] prototype for 'void secretType::getHeight() const' does not match any in class 'secretType'
[Error] candidate is: double secretType::getHeight() const

                        I’ll look over everything again.

                        Last edited on

                        They need to match exactly, including the const at the end and the return types.

                        Last edited on

                        Topic archived. No new replies allowed.

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