Why doesn't the .exe file generated by Visual Studio Code show program output?

Question

enter image description hereThe program outputs the number of the leftmost column with only positive numbers. Everything works fine in the Visual Studio Code terminal.

I think double-clicking on the automatically generated .exe file in a separate window should launch a full-fledged program that reads the input, processes it and displays the output (the number of the desired column or a message that there is none). In fact, when running this .exe file, a window appears, I can enter 12 numbers through Enter, but the window disappears after entering the 12th number.

Am I correct in my assumption, and if so, what could be causing the problem? If not, why is this file needed at all?

#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    int n = 3, m = 4;
    int matrix[n][m];
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
        {
            cin >> matrix[i][j];
        }
    };
    int col1[4];
    int col2[4];
    int col3[4];
    int col4[4];
    //создание 4 массивов-столбцов (creating 4 column arrays)
    for (int l = 0; l < n; l++)
    {
        for (int k = 0; k < m; k++)
        {
            if ((k % 4) == 0)
            {
                col1[l] = matrix[l][k];
            }
            else if (((k - 1) % 4) == 0)
            {
                col2[l] = matrix[l][k];
            }
            else if (((k - 2) % 4) == 0)
            {
                col3[l] = matrix[l][k];
            }
            else if (((k - 3) % 4) == 0)
            {
                col4[l] = matrix[l][k];
            }
        };
    };
    //поиск крайнего левого столбца только положительных чисел (finding the leftmost column of only positive numbers)
    int c = 0, s = 0;
    for (int g = 0; g < m; g++)
    {
        if (g == 0)
        {
            for (int d = 0; d < n; d++)
            {
                if (col1[d] <= 0)
                {
                    c++;
                }
            };
            if (c == 0)
            {
                s++;
                cout << "col 1";
                break;
            };
            c = 0;
        }
        else if (g == 1)
        {
            for (int d = 0; d < n; d++)
            {
                if (col2[d] <= 0)
                {
                    c++;
                }
            };
            if (c == 0)
            {
                s++;
                cout << "col 2";
                break;
            };
            c = 0;
        }
        else if (g == 2)
        {
            for (int d = 0; d < n; d++)
            {
                if (col3[d] <= 0)
                {
                    c++;
                }
            };
            if (c == 0)
            {
                s++;
                cout << "col 3";
                break;
            };
            c = 0;
        }
        else if (g == 3)
        {
            for (int d = 0; d < n; d++)
            {
                if (col4[d] <= 0)
                {
                    c++;
                }
            };
            if (c == 0)
            {
                s++;
                cout << "col 4";
                break;
            };
            c = 0;
        }
    };
    if (s == 0)
    {
        cout << "No positive columns";
    };
    return 0;
}

enter image description here

Answer 1

If you are using Microsoft Windows, then the console window will disappear as soon as your program ends. If you don't want this to happen, then you can

1. run your program from the Windows command prompt cmd.exe instead of double-clicking it, or
2. add something to the end of your program that prevents it from closing immediately, such as the following code statement:

std::system( "pause" );

Note that you will have to #include <cstdlib> in order to use std::system.