difftime : difftime « time.h « C Tutorial

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C Tutorial » time.h » difftime

25. 5. 1. difftime

Item	Value
Header file	time.h
Declaration	double difftime(time_t time2, time_t time1);
Return	returns the difference, in seconds, between time1 and time2( time2 - time1).


#include <time.h>

  #include <stdio.h>



  int main(void)

  {

    time_t start, end;

    volatile long unsigned t;



    start = time(NULL);

    for(t=0; t<500; t++) ;

    end = time(NULL);

    printf("Loop used %f seconds.\n", difftime(end, start));



    return 0;

  }

Loop used 0.000000 seconds.

25. 5. difftime
	25. 5. 1.	difftime

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