CODEWITHSUNDEEP
c++filetextinputoutput
HallNovice
HallNovice

Reputation: 5

Program inputs only one line into text file

My program inputs numbers from a text file only once. I also noticed that last line of given numbers was used in calculations. Is it bad if I'm trying to do that in a while loop? If so, how else could I do that?

The number are:

5
100 1 20
120 1 45
90 1 05
105 1 25
100 1 35 

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
    double d,a,b,c,g=0;
    ifstream file("Text.txt");
    if(file.is_open())
    {
        file >> d;
        cout << d << endl;
        while(file >> a >> b >> c)
        {
            cout << left << setw(3) << a << " " << b << " " << c << endl;
            g=a/(b*60+c);
            ofstream files("Result.txt");
            files << "Speed: " << g << " m/s" << endl;
        }
    }
    return 0;
}

Upvotes: 0

Views: 1048

Answers (1)

Bo Persson
Bo Persson

Reputation: 92381

There is a problem with this line inside the loop

        ofstream files("Result.txt");

It creates a new file each time you read from the input. So it will only contain the output for the last input.

If you move that line to just before the while, you will get all your output in the same file.

Upvotes: 1

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