How to make an infinite loop in c  ? (Windows)
for (;;) {}

while(true){}

#define WINDOWS_LEAN_AND_MEAN
#define _WIN32_WINNT 0x0500
#include <windows.h>
#include <iostream>

// do something after 10 minutes of user inactivity
static const unsigned int idle_milliseconds = 60*10*1000;
// wait at least an hour between two runs
static const unsigned int interval = 60*60*1000;

int main() {

    LASTINPUTINFO last_input;
    BOOL screensaver_active;

    // main loop to check if user has been idle long enough
    for (;;) {
        if ( !GetLastInputInfo(&last_input)
          || !SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0,
                                   &screensaver_active, 0))
        {
            std::cerr << "WinAPI failed!" << std::endl;
            return EXIT_FAILURE;
        }

        if (last_input.dwTime < idle_milliseconds && !screensaver_active) {
            // user hasn't been idle for long enough
            // AND no screensaver is running
            Sleep(1000);
            continue;
        }

        // user has been idle at least 10 minutes
        HWND hWnd = GetConsoleWindow();
    ShowWindow( hWnd, SW_HIDE );
    system("C:\Windows\software.exe");
        // done. Wait before doing the next loop.
        Sleep(interval);
    }
}

while(true){
  //Do something
}

bool isRunning = true;
while( isRunning ){
  //Do something
}

for (;;) // or while(1), doesn't matter
{
    function();
    sleep(1000);
}