Error expected initializer before double

What could be the possible error in this line :

double bx;

bx I define universally ! but I am getting the above error on compiling .Even for float bx; I get the same kind of error .

The surrounding code is :

#include "header.h"
#include "ball_pad.h"
#include "pingpong.h"
#include "texture.h"
#include "3dsloader.h"


float A = 90.0f;
float B = 70.0f;
/**********************************************************
 *
 * VARIABLES DECLARATION
 *
 *********************************************************/

// The width and height of your window, change them as you like
int screen_width=640;
int screen_height=480;

// Absolute rotation values (0-359 degrees) and rotation increments for each frame
double rotation_x=0, rotation_x_increment=0.1;
double rotation_y=0, rotation_y_increment=0.05;
double rotation_z=0, rotation_z_increment=0.03;

// Absolute rotation values (0-359 degrees) and rotation increments for each frame
double translation_x=0, translation_x_increment=1.0;
double translation_y=0, translation_y_increment=0.05;
double translation_z=0, translation_z_increment=0.03;

// Flag for rendering as lines or filled polygons
int filling=1; //0=OFF 1=ON

//Now the object is generic, the cube has annoyed us a little bit, or not?
obj_type board,ball,pad_alongX,pad_alongY;

BALL ball1//,ball2,ball3;
double bx = 0;
double by = 0;
double bvx = 2.0;
double bvy = 2.0;
double radius = 5.0;
//ball2.bx = 0;ball2.by = 0;ball2.bvx = 2.0;ball2.bvy = 2.0;ball2.radius = 5.0;
//ball3.bx = 0;ball3.by = 0;ball3.bvx = 2.0;ball3.bvy = 2.0;ball3.radius = 5.0;

PADDLE pad1,pad2,pad3,pad4;
//pad1.px = 0;pad1.py = 0;pad1.pvx = 2.0;pad.pvy = 2.0;pad1.length = 25.0;pad1.width = 5.0;

Error expected initializer before double

I Keep getting this error message, and i’m sure it has something to do with how I am attempting to call my functions. I have been at this for hours, what am I doing wrong?

error: expected initializer before ‘double’
double tsav(int tstotal,int tsgradecounter, int grade)

using namespace std;

double qzav(int qztotal,int qzgradecounter, int grade)
double tsav(int tstotal,int tsgradecounter, int grade)

double hwav(int hwtotal,int hwgradecounter, int grade)

int option; //option for menu

string firstname;
double qzaverage= qzav(qztotal,qzgradecounter,grade);
double tsaverage= tsav(tstotal,tsgradecounter,grade);
double hwaverage= hwav(hwtotal,hwgradecounter,grade);

cout > option; //print option

cout>> «Quiz»>> endl;
cin >»Test»>> endl;
cin >»Homework»>> endl;
cin > «Quiz averager»;
cout > grade;

qztotal= qztotal + grade; //total quiz grade

qzgradecounter= qzgradecounter + 1;

if (qzgradecounter !=0)

qzaverage= static_cast (qztotal)/ qzgradecounter;

tstotal= tstotal + grade;

tsgradecounter= tsgradecounter + 1;

if (tsgradecounter !=0)

tsaverage= static_cast (tstotal)/ tsgradecounter;

hwtotal= hwtotal + grade;

hwgradecounter= hwgradecounter + 1;

if (hwgradecounter !=0)

hwaverage= static_cast (hwtotal)/ hwgradecounter;

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Error expected initializer before double

I have not a lot of experience with C++. So far I did everything in one file. Now I tried to use 2 source files and 1 header.
I get the message that an initializer is expected.

This is the code of the mein source file (where the error is reported)

#include
#include
#include
#include «subs.h»

using namespace std;

int main()
<
int N(10000); //number of steps for the randomwalk
int N2(1000); //number of randomwalks
double steplength(1); //length of one step
double *R;
R= new double[N2];
//initial seed
int seed (11324);

#include
#include
#include

using namespace std;

double randomwalk(int seed, int N, double steplength) <
//random number generator
unsigned int c(16807);
unsigned int p(21474837);
unsigned int *r;
double *randomnumb;
r= new unsigned int[N+1];
randomnumb=new double [N];
r[0]=seed;
randomnumb[0]=r[0];
randomnumb[0]=randomnumb[0]/p;
//generate random numbers
for(int i=1;i

Sorry, the last line «and the header» should be above:

#ifndef SUBS_H_INCLUDED
#define SUBS_H_INCLUDED

int N(10000); //number of steps for the randomwalk
int N2(1000); //number of randomwalks

These values, Right?

What is with these values?

The error message is: line 6 error: expected initializer before using

There is some problem with an initializer, but I don’t know what this means.

correct me if I’m wrong but you have 3 files

If this is what you mean your on the right track, but you need to understand how compiling works.
To put it in a simple way, the compiler will compile every cpp file separately first, doing a #include «something.h» will tell the compiler that some thing you call will be found in a other file (in this case something.h. But at this point the compiler has no clue where the code is only what will be in it. After this the linker will combine all these files to one binary. In your case the linker can’t find where the actual code for subs.h is (sins header and source files don’t need to have the same name or even be in the same location) This is why a source file needs to include it’s own header file to let the linker know what header file is linked to what source file. So you only need to add #include «subs.h» to the top of your subs.cpp file:

And since you are using header safeguards the actual source will only be inserted ones (upon the first include) in the final binary.

(In a actual compiler and more advanced stuff it’s a bit more complicated then this, and the compiler/linker does many more things. But that’s stuff you don’t touch unless you know what you are doing.)

Ok, I added #include «subs.h» into my randomwalk.cpp file. I still get an error «expected initializer before double». It is in the randomwalk.cpp file. (6. Line)

To your first question, yes I have 3 files, only that the file subs.cpp is called randomwalk.cpp .

This is what I compiled on my computer and it worked fine:
If you still get a error with this, it’s not in the code.

What is the command you use to compile and link?

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Error expected initializer before double

I’m writing a class with an array and I’m supposed to calculate the average of some entered grades outside the class and in the main but I get the error
Expected Initializer before ‘.’ token

I’m not to sure what to do or i even did the class right
Please help!

What if I promised you $1000, but then just walk away, leaving you empty handed?
You make a promise on line 24, but you don’t keep it.

The error is on line 44. Please explain this code:
float gradeAverage.getGrade();

Line 44 looks like a nice prototype, but what is it doing in the middle of the program?

In the function «getGrade()» Why are you printing the array when you should be returning something from the array. In this case the «getGrade()» function should have a parameter the represents the element of the array that you need.

As you have it «float getGrade ()» would be better named «void printGrades ()».

Hope that helps,

I know that i shouldn’t be printing the there but the question was my teacher gave me was this
Write a class called Student that contains a property called grades that can store a
maximum of 10 grades. Create a setter and a getter method. The setter method
will take no parameters and return no parameters. Instead, within the setter
method you must construct a loop that will ask the user to enter 10 grades. The
getter method will simply print the 10 grades; so, it will take no and return no
parameters. Yes, that is a misnomer; this is because passing and returning arrays
has not been covered yet. Create another method called computeAverage that
return the average of all the grades. Create another method called
minimumGrade that returns the minimum grade the student received.

He knows it’s a misnomer but he wants us to do it anyway.
He hasn’t covered it yet so I was just looking it up but nothing I find helps

Now that I see what is required I will take a look tomorrow and see what I can do.

Источник

Error expected initializer before double

I am trying to make a calculator program and I am getting an error when I try to define a function from a class template

I get an error here:

template void Calculator ::set_operand_one()

You have variables mOperand1 etc but the constructor has operand1 etc — the spelling difference is part of what the compiler is complaining about.

You’ll need this include for vector.
#include

Edit:
See this earlier answer about initializing a static variable.
http://www.cplusplus.com/forum/beginner/100701/

I don’t think anyone is understanding.

The problem is not in the constructor, it is here:

void Calculator ::set_operand_one(T op1)

it gives an error: expected initializer before ‘

Please help:: Error message expected initializer before ‘double’

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