c++程序计时ctime

给程序计时

#include<ctime>
#include<iostream>

using namespace std;

int main(){
	// 计时
	clock_t time_stt = clock();
    for(int i=0; i<100000000; i++);
	cout<<" time use in normal inverse is "<< 1000 * (clock() - time_stt)/(double)CLOCKS_PER_SEC << "ms"<<endl;
    return 0;
}