Run .exe after taking PATH C++

Question

Can you help me? I need to run a file type of .exe . I have got two test1.txt and test2.txt files and in those files there are two PATHes to pr1.exe and pr2.exe . But in the first txt file I run pr1.exe and pr2.exe , in another one there are pr2.exe and pr1.exe .

#include <iostream>
#include <fstream>
#include <process.h>

using namespace std;
int main(int argc, char *argv[]) {

    cout << "argc = " << argc << endl;
    for (int i = 0; i < argc; i++) {
        cout << "Argument: " << i << " = " << argv[i] << endl;
    }

    if (argc != 2) {
        cout << "Error" << endl;
        exit(-1);
    }
    char ch;
    ifstream infile;
    infile.open(argv[1]);
    if (!infile) {
        cout << "errrrror: cant open a file" << argv[1];
        exit(-1);
    }
    while (infile) {
        infile.get(ch);
        cout << ch;
    }
    cout << endl;
    system("pause");

    return 0;
}

For example: I write path of the test1.txt and it prints two PATHes of pr1.exe and pr2.exe it's like:

"C:\\Users\\N\\Desktop\\process\\The 2d file\\Debug\\The 2d file.exe"

"C:\\Users\\N\\Desktop\\process\\the 1st file\\Debug\\the 1st file.exe"

Can you advice me how I should run them?

Answer 1

What you're looking for is the CreateProcess function, more info can be found on msdn :

    // start the program up
    #include "windows.h"

    std::wstring("pr1.exe");
    STARTUPINFO si;     
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );
    if(!CreateProcess(NULL, (LPWSTR)wstr.c_str(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi))
    {
           //error
    }

    CloseHandle( pi.hProcess );
    CloseHandle( pi.hThread );

Note: If you're not sending any command line paramaters with your program, you could also swap the first and second argument.