int main()
{
    int start_time=0, end_time=0;
    int duration=0;
    int min=0, sec=0, milisec=0;
   
    start_time = clock();
    /////////////////////////////////
    (함수 실행부)
    /////////////////////////////////
    end_time = clock();

    duration = end_time - start_time;
    milisec = duration % 1000;
    sec     = duration / 1000;
    min     = sec / 60;
    sec     = sec % 60;

    
    printf("\n소요시간 => %d분 %d초 %d밀리초\n",min,sec,milisec);
    
    return 0;
}