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difftime

Syntax

 
#include <time.h>

double difftime(time_t t1, time_t t0);

Description

This function returns the difference in time, in seconds, from t0 to t1.

Return Value

The number of seconds.

Portability

ANSI/ISO C C89; C99
POSIX 1003.2-1992; 1003.1-2001

Example

 
time_t t1, t0;
double elapsed;
time(&t0);
do_something();
time(&t1);
elapsed = difftime(t1, t0);


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