program_execution_time_v1.c

/*

    program_execution_time_v1.c

    https://www.tutorialspoint.com/c_standard_library/c_function_clock.htm


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include <stdio.h>
#include <time.h>           // clock_t, clock(), CLOCKS_PER_SEC

int main (void)
{
    clock_t start_time, end_time;
    double elapsed_time;
    int i;

    start_time = clock();   // start measuring time

    for(i=0; i< 1000; i++)  // a function whose execution time is measured
    {
        printf("\n i = %d", i);
    }

    end_time = clock();     // end measuring time

    elapsed_time = (double)(end_time - start_time) / CLOCKS_PER_SEC;

    printf("\n\n CLOCKS_PER_SEC = %d \n", CLOCKS_PER_SEC);

    printf("\n start_time   = %5ld clocks \n end_time     = %5ld clocks \n\n elapsed_time = %lf s \n",
            start_time, end_time, elapsed_time);

    return(0);
}