计算代码运行时间
- clock()函数
- clock_t clock(void);
- typedef long clock_t;
- #define CLOCKS_PER_SEC 1000 //故每个clock为1ms
1 #include<iostream>
2 #include<time.h>
3
4 int main()
5 {
6 clock_t start_time=clock();
7
8 {
9 //被测试代码
10 }
11
12 clock_t end_time=clock();
13 cout<< "Running time is: "<<static_cast<double>(end_time-start_time)/CLOCKS_PER_SEC*1000<<"ms"<<endl;//输出运行时间
14 return 0;
15 }
- GetTickCount()函数
- DWORD GetTickCount(void);
- elapsed time < 49.7days
1 #include<iostream>
2 #include<windows.h>
3
4 int main()
5 {
6 DWORD start_time=GetTickCount();
7 {
8 //此处为被测试代码
9 }
10 DWORD end_time=GetTickCount();
11 cout<<"The run time is:"<<(end_time-start_time)<<"ms!"<<endl;//输出运行时间
12 return 0;
13 }
