Thread: Reading data from files

I am having trouble getting the code below to work. My first problem is that the first checkSpecials function returns all but the first line.

The second checkSpecials function returns 0 for all values. I dont know if I am using the correct way to assign "names" to the vaules.

the input file looks something like this:

5 2 2 670.60

Code:

#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;

void checkSpecials(ifstream& infile)
{
	cout << endl << "Display orders stored in file orders.dat: " << endl;
	while (infile)
	{
		string temp;
		getline(infile, temp);
		cout << temp << endl;
	}
}
 
void checkSpecials(ifstream& infile, ofstream& outfile)
{
	int numSpecials = 0;
	float commision = 0;
	int noServed =0;
	float avgSpent = 0;
	int count = 0;
	int value, members, specials, wine, bill, total;

	infile >> members >> specials >> wine >> bill;

	while(infile >> value)
	{
		noServed ++;
		total += total;
		avgSpent = ((total / noServed) + (total % noServed));

		if((members >= 5) && (specials >= 4) && (wine >= 2))
		{
		        
                                        numSpecials ++;
		}
		
	}

	outfile << "Number of families that ordered the special: " << numSpecials << endl
	           << "Commision earned from the special meal: " << commision << endl
	           << "Average spent per person for the evening: " << avgSpent << endl;
	}


int main()
{
	ifstream infile;
	ofstream outfile;
	string outName = "c:\\datafiles\\result.dat";
	string inName = "c:\\datafiles\\orders.dat";

	int members, special, wine;
	float total;

	infile.open(inName.c_str());
	outfile.open(outName.c_str());
	outfile.precision(2);

	if  (!infile) 
	{
		cout << "Cannot open infile " << infile << " Aborting!" << endl;
		exit(1);
	}

	if (!outfile) 
	{
		cout << "Cannot open oufile " << outfile << " Aborting!." << endl;
		exit(1);
	}

		
	checkSpecials(infile); 

	checkSpecials(infile, outfile);

	infile.close();
	outfile.close();
		
	return 0;
}

Brilliant thank you. That solves my first problem.

Would you also be able to help with the second problem? With the input file containing a few lines in the format: 5 2 5 680.00. Am I correct in using

Code:

 infile >> members >> specials >> wine >> bill;

to input the values?

Code:

void checkSpecials(ifstream& infile, ofstream& outfile)
{
	int numSpecials = 0;
	float commision = 0;
	int noServed =0;
	float avgSpent = 0;
	int count = 0;
	int value, members, specials, wine, bill, total;

	infile >> members >> specials >> wine >> bill;

	while(infile >> value)
	{
		noServed ++;
		total += total;
		avgSpent = ((total / noServed) + (total % noServed));

		if((members >= 5) && (specials >= 4) && (wine >= 2))
		{
		        
                                        numSpecials ++;
		}
		
	}

	outfile << "Number of families that ordered the special: " << numSpecials << endl
	           << "Commision earned from the special meal: " << commision << endl
	           << "Average spent per person for the evening: " << avgSpent << endl;
	}