用c++实现获取程序运行的时间

 1 #include<iostream>
 2 #include<ctime>
 3 using namespace std;
 4 int main()
 5 {
 6     time_t begin,end;
 7     begin=clock();
 8     cout<<"**************************\n\n\n\n\n\nI love you!\n\n\n\n\n**************************"<<endl;
 9     end=clock();
10     cout<<"runtime:"<<double(end-begin)/CLOCKS_PER_SEC<<"s"<<endl;
11 }