C++中计时、延时函数,windows跟Linux

（1）clock()函数用法

void timeConsume()
{
    double start,stop,durationTime;
    start = clock();
    /*

    ...代码片段

    */
    stop = clock();

    durationTime = ((double)(stop-start))/CLK_TCK;
    cout << "程序耗时：" << durationTime << " s" << endl;
}

（2）time()函数用法

void timeConsume()
{
    double start,stop,durationTime;
    start = time(NULL);
    /*

    ...代码片段

    */
    stop = time(NULL);

    durationTime = (double)difftime(stop, start);
    cout << "程序耗时：" << durationTime << " s" << endl;
}

（3）延时函数

 

Windows环境下计时延时函数代码如下：
#include <iostream>
#include <Windows.h>

using namespace std;
int main()
{
    double start, stop, durationTime;
    start = clock();

    Sleep(5 * 1000);    //程序延时5s
    stop = clock();
    durationTime = ((double)(stop - start)) / CLK_TCK;
    cout << "总耗时：" << durationTime << endl << endl;
    return 0;
}

Linux环境下代码如下：
#include <iostream>
#include <unistd.h>

using namespace std;

int main()
{
    double startTime,stopTime,durationTimeTime;

    startTime=time(NULL);

    sleep(5);

    stopTime=time(NULL);

    durationTimeTime = (double)difftime(stopTime,startTime);

    cout << "耗时(time): " << durationTimeTime << " s" << endl;


    return 0;
}