C ++只有第一个答案行正确

Question

I get problem with my program ,it prints correct only first line answer here is my .txt file,first number (3) is shops number,second number (5) is products number ,other lines is prices for products

3 5
1.27 2.92 3.45 1.09 0.89
1.08 2.25 3.75 1.12 0.69
0.98 2.48 3.62 1.10 0.72

And here`s my results.txt file ,in witch are all results of each line

 9.62
 8.89
 8.90

My program code:

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    double dienos, results;
    int shops;

    ifstream fin ("duomenys1.txt");
    fin >> shops;

    for( int shop = 1; shop <= 3; shop++ ) {
        results = 0;
        fin >> dienos;

        for ( int pricelist = 1; pricelist <= 5; pricelist++ ) {
            double price;
            fin >> price;
            results += price;

        }
        cout << results << endl;

    }
}

Answer 1

I suspect that in:

ifstream fin ("duomenys1.txt");
    fin >> shops;

    for( int shop = 1; shop <= 3; shop++ ) {
        results = 0;
        fin >> dienos;

The fin >> dienos should be outside of your loop.

Also both loops are hard-coded, rather than using the values read.

Answer 2

Can you try this code:

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    double dienos, results;
    int shops;

    ifstream fin("duomenys1.txt");
    fin >> shops;
    fin >> dienos;

    for (int shop = 1; shop <= shops; shop++)
    {
        results = 0;
        for (int pricelist = 1; pricelist <= dienos; pricelist++)
        {
            double price;
            fin >> price;
            results += price;
        }
        cout << results << endl;
    }
}