difftime

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 header to Include
9 Reference

Description

The difftime function computes the difference between the two supplied time values timer0 and timer1.

Syntax

double difftime( time_t timer1, time_t timer0 )

Parameters

[input] timer1: Ending time;
[input] timer0: Beginning time

Return

the elapsed time in seconds, from timer0 to timer1. The value returned is a double-precision floating-point number.

Examples

EX1

void difftime_ex1()
{
    time_t   start, finish;
    long loop;
    double   result, elapsed_time;
 
    printf( "Multiplying 2 floating point numbers 100 thousand times...\n" );
 
    time( &start );
    for( loop = 0; loop < 100000; loop++ )
       result = 3.63 * 5.27; 
    time( &finish );
    elapsed_time = difftime( finish, start );
    printf( "\nProgram takes %6.0f seconds.\n", elapsed_time );
}