gpt4 book ai didi

c语言clock函数使用示例

转载 作者:qq735679552 更新时间:2022-09-28 22:32:09 24 4
gpt4 key购买 nike

CFSDN坚持开源创造价值,我们致力于搭建一个资源共享平台,让每一个IT人在这里找到属于你的精彩世界.

这篇CFSDN的博客文章c语言clock函数使用示例由作者收集整理,如果你对这篇文章有兴趣,记得点赞哟.

clock_t clock( void ); Calculates the processor time used by the calling process head file is <time.h> Return Value clock returns the number of clock ticks of elapsed processor time. The returned value is the product of the amount of time that has elapsed since the start of a process and the value of the CLOCKS_PER_SEC constant. If the amount of elapsed time is unavailable, the function returns –1, cast as a clock_t. Remarks The clock function tells how much processor time the calling process has used. The time in seconds is approximated by dividing the clock return value by the value of the CLOCKS_PER_SEC constant. In other words, clock returns the number of processor timer ticks that have elapsed. A timer tick is approximately equal to 1/CLOCKS_PER_SEC second. In versions of Microsoft C before 6.0, the CLOCKS_PER_SEC constant was called CLK_TCK. 。

  。

复制代码 代码如下:

/* CLOCK.C: This example prompts for how long
 * the program is to run and then continuously
 * displays the elapsed time for that period.
 */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void sleep( clock_t wait );
void main( void )
{
   long    i = 600000000L;
   clock_t start, finish;
   double  duration;
   /* Delay for a specified time. */
   printf( "Delay for three seconds\n" );
   sleep( (clock_t)3 * CLOCKS_PER_SEC );
   printf( "Done!\n" );
   /* Measure the duration of an event. */
   printf( "Time to do %ld empty loops is ", i );
   start = clock();
   while( i-- )

   finish = clock();
   duration = (double)(finish - start) / CLOCKS_PER_SEC;
   printf( "%2.1f seconds\n", duration );
}
/* Pauses for a specified number of milliseconds. */
void sleep( clock_t wait )
{
   clock_t goal;
   goal = wait + clock();
   while( goal > clock() )

}//sleep

最后此篇关于c语言clock函数使用示例的文章就讲到这里了,如果你想了解更多关于c语言clock函数使用示例的内容请搜索CFSDN的文章或继续浏览相关文章,希望大家以后支持我的博客! 。

24 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com