c++计算程序时间

#include<iostream>#include<windows.h>int main(){DWORD start_time=GetTickCount();{//此处为被测试代码}DWORD end_time=GetTickCount();cout<<"The run time is:"<<(end_time-start_time)<<"ms!"<<endl;//输出运行时间return 0;}

或者

#include<iostream>#include<time.h>int main(){clock_t start_time=clock();{//被测试代码}clock_t end_time=clock();cout<< "Running time is: "<<static_cast<double>(end_time-start_time)/CLOCKS_PER_SEC*1000<<"ms"<<endl;//输出运行时间return 0;}