Thread: Can someone help me with setprecision?

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 correctly\n";
	}
	if (outfile.fail()) 
	{
		std::cout << "Output file failed to open correctly\n";
	}
	if (infile2.fail())
	{
		std::cout << "Scratch file failed to open correctly\n";
	}

	// 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");
}

Try also

Code:

outfile.precision(4);

though it should make a difference.

As a minor note, you might want to use std::fixed as well. No idea why it doesn't work for you

I tried that earlier (outfile.precision(4)) and it didn't work. I'll give fixed a shot.

EDIT:That didn't work either. I had this thought though. I read the data into holder which is a character array. I am guessing the setprecision isn't working like I want because the computer doesn't think it is dealing with numbers. Does this make any sense?