Error setprecision was not declared in this scope

I am trying to use setprecision but I keep getting the error

Code:

RasMolMaker.cpp:124: error: ‘precision’ was not declared in this scope

I don’t understand why I am getting this error when I include the <iomanip> header. Can someone tell me where I am going wrong? Thanks

BTW, the problem line is at the bottom of the main section at the end of the while loop.

My header file is:

Code:

#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
#include <ios>
#include <cstdlib>


void writeBash(char* file);
void writeCleanup();
void Clearspace();
void clearSpace();

and my code is:

Code:

#include "RasMolMaker.h"

int main(const int argc, const char** argv)
{
	char ch,holder[100];
	const char* c_str();
	std::string str,suffix,RasFile;
	//std::string filename;
	suffix = ".pdb";
	
	/*
	// Get filename and open stream
	std::cout << "Enter filename:n";
	std::cin >> filename;
	std::cout << "Opening " << filename << "...n";	
	std::ifstream infile;
	//infile.open(filename.c_str());
	*/
	
	// Open config file for input
	std::ifstream infile, infile2;
	infile.open("config");

	// Write formatting bash script
	char* filename = "config";
	writeBash(filename);

	// Open scratch file for input
	infile2.open(".17834039BOSUQWU239MBKA89");

	/*
	// Create RasMol file and open stream
	RasFile = filename + suffix;
	std::cout << "Output will be to file " << RasFile << "n";
	std::ofstream outfile;
	//outfile.open(RasFile.c_str());
	*/
	
	// Open config.pdb for output
	std::ofstream outfile;
	outfile.open("config.pdb");
	
	// Check files opened correctly
	if (infile.fail()) 
	{
		std::cout << "Input file failed to open correctlyn";
	}
	if (outfile.fail()) 
	{
		std::cout << "Output file failed to open correctlyn";
	}
	if (infile2.fail())
	{
		std::cout << "Scratch file failed to open correctlyn";
	}

	// Find the size of the file
	infile2.seekg(0, std::ios::end);
	long len = infile2.tellg();
	infile2.seekg(0, std::ios::beg);

	double x,y,z;
	int index = 0;
	while(infile2.tellg() <= (len-2) && infile2.tellg() >=0)
	{
		
		if(index > 0 && index % 3 == 0)
		{
			outfile << "n";
		};
		if (index % 3 == 0 )
		{
			if (index/3 < 10)
			{
				if (index/3 % 20 < 10) {
					outfile << "ATOM      " << index/3 << "  N" << "                 ";
				}
				else {
					outfile << "ATOM      " << index/3 << "  O" << "                 ";
				}				
			}
			if (index/3 >= 10 && index/3 < 100)
			{
				if (index/3 % 20 < 10) {
					outfile << "ATOM     " << index/3 << "  N" << "                 ";
				}
				else {
					outfile << "ATOM     " << index/3 << "  O" << "                 ";
				}

			}
			if (index/3 >= 100 && index/3 < 1000)
			{
				if (index/3 % 20 < 10) {
					outfile << "ATOM    " << index/3 << "  N" << "                 ";
				}
				else {
					outfile << "ATOM    " << index/3 << "  O" << "                 ";
				}

			}
			if (index/3 >= 1000 && index/3 < 10000)
			{
				if (index/3 % 20 < 10) {
					outfile << "ATOM   " << index/3 << "  C" << "                 ";
				}
				else {
					outfile << "ATOM   " << index/3 << "  C" << "                 ";
				}

			}
			
		}
		infile2 >> holder;
		outfile << setprecision(4) << holder << "   ";
		index++;
	}
	// Check file position before closing
	std::cout << "File length: " << len << "n";
	std::cout << "File position before closing: " << infile.tellg() << "n";
	infile.close();
	outfile.close();
	writeCleanup();
	clearSpace();

	return 0;
}

void writeBash(char* file)
{
	// Open output file stream
	std::ofstream out;
	out.open("cleaner.sh");
	// Write bash script
	out << "grep -v 'molecule' " << file << "| grep -v 'BOUNDARY' | grep -v 'MOLECULES' | grep -v 'species' | grep -v 'nMolecule' | grep -v 'orthorhombi' | grep -v 'cubic' | grep -v 'tetragonal' > .17834039BOSUQWU239MBKA89";
	// Make script executable
	std::system("chmod +x cleaner.sh");
	// Close filestream
	out.close();
	// Execute script
	std::system("./cleaner.sh");
}

void writeCleanup()
{
	// Open output filestream
	std::ofstream out;
	out.open("wipe.sh");
	// Write bash script
	out << "rm .17834039BOSUQWU239MBKA89";
	// Make script executable
	std::system("chmod +x wipe.sh");
	// Close filestream
	out.close();
	// Execute script
	std::system("./wipe.sh");
}

void clearSpace()
{
	std::system("rm wipe.sh cleaner.sh");
}

Thank you in advance for any assistance. I am working on a final project and I’m writing a program which converts fahrenheit to celsius. I am getting 3 «not declared in scope error messages on lines 25, 27, and 31. I am not sure what I’m doing wrong. This what I have so far.

1. #include <iostream>
2.
3. using namespace std;
4.
5. int main()
6. {
7. double userInput;
8. cout << «Enter Fahrenheit Value: «; // asks for a value to convert
9. do // starts the do loop
10. {
11. cin >> userInput; //user input value
12. cout << «n»; // blank line
13. if (cin.fail() || (userInput > 213) || (userInput < -147)) // defines the range of acceptable user input values
14. {
15. cout << «invalid value, please try again: «; // output when unacceptable value is input
16. cin.clear(); // clear
17. cin.ignore(); // so output doesn’t repeat
18. }
19.
20. } while (cin.fail() || (userInput > 213) || (userInput < -147)); // defines acceptable range of user input values
21.
22. double celsius;
23. celsius = (userInput — 32) *5.0 / 9.0; //sets output formula
24. cout << fixed; //enables for specific decimal precision
25. cout << setprecision(2); //sets precision value to 2 points after the decimal
26. cout << «n»; //blank line
27. cout << internal << showpos << setw(5) << userInput << » Degrees Fahrenheit = » << celsius << » Degrees Celsius. n» << endl << endl; //output display for result calculated with +/- symbol included
28.
29. cout << «Would you like to convert more values?» << endl << endl; //asks to continue or not
30. cout << «Enter ‘Y’ to continue.» << endl << endl; // requires user input to continue or end program
31. cin >> again; //change control variable
32. cout << endl; // spacing for viewing ease
33.
34. }

Okay, first of all, in order to user setw and setprecision, you need to include the iomanip library.
So write this on line 2 (after including iostream) :
#include <iomanip>

31. cin >> again; //change control variable

Then in line 31, you want user to input something and store it in ‘again’ but you have not declared what again is. The compiler doesn’t know what that is if it is a char or a string or an int or a double.
So somewhere before that statement, you need to declare the variable ‘again’.

Hope that helps!

Newbiee999,

Thanks I really appreciate the help. Your suggestion helped most definitely. I took out line 31, but now after entering «Y» to continue, I can’t figure out how to ask to run line 8 again. My instructions are to use repetitive statements such as DO WHILE, FOR, or IF THEN ELSE to do the conversion again. When I run the program, it does its thing but then after it says to enter «Y» to continue, and I enter «Y», it says process returned. I have to figure out how to get it to ask to re-enter values again after I press «Y». This is what I have now.

1. #include <iostream>
2. #include <iomanip>
3.
4. using namespace std;
5.
6. int main()
7. {
8. double userInput;
9. cout << «Enter Fahrenheit Value: «; // asks for a value to convert
10. do // starts the do loop
11. {
12. cin >> userInput; //user input value
13. cout << «n»; // blank line
14. if (cin.fail() || (userInput > 213) || (userInput < -147)) // defines the range of acceptable user input values
15. {
16. cout << «invalid value, please try again: «; // output when unacceptable value is input
17. cin.clear(); // clear
18. cin.ignore(); // so output doesn’t repeat
19. }
20.
21. } while (cin.fail() || (userInput > 213) || (userInput < -147)); // defines acceptable range of user input values
22.
23. double celsius;
24. celsius = (userInput — 32) *5.0 / 9.0; //sets output formula
25. cout << fixed; //enables for specific decimal precision
26. cout << setprecision(2); //sets precision value to 2 points after the decimal
27. cout << «n»; //blank line
28. cout << internal << showpos << setw(5) << userInput << » Degrees Fahrenheit = » << celsius << » Degrees Celsius. n» << endl << endl; //output display for result calculated with +/- symbol included
29.
30. cout << «Would you like to convert more values?» << endl << endl; //asks to continue or not
31. cout << «Enter ‘Y’ to continue.» << endl << endl; // requires user input to continue or end program
32. cout << «Re-enter values»; //user inputs value again
33. cout << endl; // spacing for viewing ease
34.
35. }

@ CreasyBear

Ok, what I would suggest is that you before all you code in main, declare a char ‘again’ and set it to ‘Y’ and then put everything in a big while loop that runs only if again = ‘y.

so do something like this:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37

#include <iostream> 
#include <iomanip> 
using namespace std; 
int main(){
char again = 'Y';
	while (again == 'Y' || again == 'y')
	{
		double userInput;
		cout << "Enter Fahrenheit Value: "; // asks for a value to convert
		do // starts the do loop
		{
			cin >> userInput; //user input value
			cout << "n"; // blank line
			if (cin.fail() || (userInput > 213) || (userInput < -147)) // defines the range of acceptable user input values
			{
				cout << "invalid value, please try again: "; // output when unacceptable value is input
				cin.clear(); // clear
				cin.ignore(); // so output doesn't repeat
			}

		} while (cin.fail() || (userInput > 213) || (userInput < -147)); // defines acceptable range of user input values

		double celsius;
		celsius = (userInput - 32) *5.0 / 9.0; //sets output formula
		cout << fixed; //enables for specific decimal precision
		cout << setprecision(2); //sets precision value to 2 points after the decimal
		cout << "n"; //blank line
		cout << internal << showpos << setw(5) << userInput << " Degrees Fahrenheit = " << celsius << " Degrees Celsius. n" << endl << endl; //output display for result calculated with +/- symbol included

		cout << "Would you like to convert more values?" << endl << endl; //asks to continue or not
		cout << "Enter 'Y' to continue." << endl << endl; // requires user input to continue or end program
		cin >> again;  // After user enters, it'll check the big while loop condition
                                       // only if user enters 'Y' or 'y', it'll continue
		cout << endl; // spacing for viewing ease
	}
return 0;
}

I have made changes to only lines 5, 6, and 32.

Hope this helps!

newbiee999,

Thank you very much. That did it. The program is working as intended. I really appreciate all your help. Have a Happy Memorial Day.

//You have to include header file
#include <iomanip> 

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int x = 109887;
cout << fixed << setprecision(3) << x;

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