C/time.h/clock

    
//Declaration:  clock_t clock(void); 
 

//To transform this value into seconds, divide it by CLOCKS_PER_SEC.

  #include <time.h>
  #include <stdio.h>
  int main(void)
  {
   
    printf("Elapsed time: %u secs.\n", clock()/CLOCKS_PER_SEC);
   
  }
         
/*
Elapsed time: 0 secs.
*/