Setw() out files, while(!inFile.eof()) repeats final term

[Programmer Will]

I'm trying to collect some data point from a file and display and perform various calculations with them. I suppose it would help if I knew the correct way to go about storing the correct numbers in the correct variables but after hours of research, looking over my notes and pouring through my book I cannot for the life of me figure out how to do what I want to do. Here's the assignment...

A data file contains unknown number of lines of values representing triangles and each line contains;

Triangle number (integer)
Side lengths (three floating point numbers)

Write a program that
reads the data for each triangle and finds and displays the perimeters, areas and .....(other things I have to do).... of the triangles.



Here's what a data file looks like:

1 25.19 24.48 43.85 2 17.66 22.47 48.18 3 2.11 48.65
9.46 4 33.36 29.32 33.76 5 18.05 31.01 40.56 6 0.96 4.19 48.74
7 32.57 11.56 20.17 8 6.10 13.42 12.89 9 16.58 7.61 17.40 10
6.08 44.21 4.71 11 46.50 19.95 2.37 12 17.12 36.80 39.73 13 27.25 34.31 44.68 (etc...)


This is all represented on one/two line(s) in a .dat file.

The output is to look something like


Triangle No SideA SideB SideC Perimeter Area
2 21.47 12.86 14.88 49.21 93.86
3 21.24 5.96 24.75 51.95 54.91
4 35.32 12.18 39.25 86.75 212.03

But my program, I'm sure because I'm reading in my data incorrectly is spewing out this little number.


1 25.1924.4843.85 217.6622.47 48.1832.11
48 0.659.464 33.3629.3233.76 518.0531.01
40 0.5660.96 4.1948.747 32.5711.5620.17
8 6.113.4212.89 916.587.61 17.4106.08
44 0.214.7111 46.519.952.37 1217.1236.8
39 0.731327.25 34.3144.6814 2.7415.182.31
15 9.7736.0136.09 1643.8929.12 3.531746.14
40 0.0214.318 27.1849.2435.78 1941.9521.66
23 0.532028.04 13.4537.4521 25.1932.3415.39
22 6.9423.7818.12 2339.4139.01 33.43246.68
1 0.0827.9925 15.0446.9749.05 2614.3340.04
44 0.812729.88 44.247.1928 27.4636.4228.84


I can see my data in there but all messed up. I'm thinking it has to do with the decimal points?

Here is my code so far...

//----------------------------------------\\
// Purpose: To determine if data given by
// a file creates real triangles and if so
// to then calculate data sbout them. 
// Name: Will Beeler
// Date:October 28, 2009
//----------------------------------------\\

#include <iostream>
#include <iomanip>
#include <cctype>
#include <string>
#include <fstream>

using namespace std;

int main()

{

	string inFileTriangle, outFileTriangle;
	ifstream inFile;
	ofstream outFile;
	int triangleNumber;
	double sideLength1, sideLength2, sideLength3;
	
	

	cout << "Enter the name of the input file: ";
	cin >> inFileTriangle;

	inFile.open(inFileTriangle.c_str());
	cout << "Enter the name of the output file: ";
	cin >> outFileTriangle;

	outFile.open(outFileTriangle.c_str());
	

	if( !inFile.good() )
	{
	cout << "Error opening input file" << endl;
	return 0;
	}//end if

	  if( !outFile.good() )  
    {     
        cout << "Error opening output file"<<endl;  
        return 0;  
    }//end if


	cout << "Triangle No  SideA   SideB   SideC   Perimeter   Area\n";
	
	while(!inFile.eof())
	{
		
		inFile >> triangleNumber ;
		cout << endl << "        " << triangleNumber << "   ";
		outFile << endl << "        " << triangleNumber << "   ";
		
		for(int i = 1; i < 4 ; i++)
		{
			inFile >> sideLength1;
			inFile >> sideLength2;
			inFile >> sideLength3;

			outFile << setw(9) << sideLength1 << sideLength2 << sideLength3;
			cout << setw(9) << sideLength1 << sideLength2 << sideLength3;

		}//end for
	}// end while

return 0;
}

Any help greatly appreciated. Thank you.

[Programmer Will]

Ok, I didn't need that loop getting the sideLength1, 2, and 3 each time. Now it's only setw() that's not working. Any advice?

#include <iostream>
#include <iomanip>
#include <cctype>
#include <string>
#include <fstream>

using namespace std;

int main()

{

	string inFileTriangle, outFileTriangle;
	ifstream inFile;
	ofstream outFile;
	int triangleNumber;
	double sideLength1, sideLength2, sideLength3;
	
	

	cout << "Enter the name of the input file: ";
	cin >> inFileTriangle;

	inFile.open(inFileTriangle.c_str());
	cout << "Enter the name of the output file: ";
	cin >> outFileTriangle;

	outFile.open(outFileTriangle.c_str());
	

	if( !inFile.good() )
	{
	cout << "Error opening input file" << endl;
	return 0;
	}//end if

	  if( !outFile.good() )  
    {     
        cout << "Error opening output file"<<endl;  
        return 0;  
    }//end if


	cout << "Triangle No  SideA   SideB   SideC   Perimeter   Area\n";
	
	while(!inFile.eof())
	{
		
		inFile >> triangleNumber ;
		cout << endl << "        " << triangleNumber << "   ";
		outFile << endl << "        " << triangleNumber << "   ";
		
		
		inFile >> sideLength1 >> sideLength2 >> sideLength3;

		outFile << setw(5) << sideLength1 << sideLength2 << sideLength3;
		cout << setw(5) << sideLength1 << sideLength2 << sideLength3;

		
	}// end while 

output...



1 25.1924.4843.85
2 17.6622.4748.18
3 2.1148.659.46
4 33.3629.3233.76
5 18.0531.0140.56
6 0.964.1948.74
7 32.5711.5620.17
8 6.113.4212.89
9 16.587.6117.4
10 6.0844.214.71
11 46.519.952.37
12 17.1236.839.73
13 27.2534.3144.68
14 2.7415.182.31
15 9.7736.0136.09
16 43.8929.123.53
17 46.1440.0214.3
18 27.1849.2435.78
19 41.9521.6623.53
20 28.0413.4537.45
21 25.1932.3415.39
22 6.9423.7818.12

[firedraco]

You need to output a ' ' after each <<, since the >> will "eat" the space (it will not be printed for you later when you use << on the variable).

[Programmer Will]

Alright so I got setw() working for the cout commands but when I export to the outFile setw() does not have an effect. Any ideas?

Also while(!inFile.eof()) repeats the final term so it is printed and calculated twice. Any solutions?