c++ 查看程序运行时间

 1 //计算一段程序运行的时间
 2 #include<iostream>
 3 #include<time.h>
 4 using namespace std;
 5 int main()
 6 {
 7     clock_t startTime,endTime;
 8     startTime = clock();//计时开始
 9     for (int i = 0; i < 2147483640; i++)
10     {
11         i++;
12     }
13     endTime = clock();//计时结束
14     cout << "The run time is: " <<(double)(endTime - startTime) / CLOCKS_PER_SEC << "s" << endl;
15     system("pause");
16     return 0;
17 }