69,382
社区成员
发帖
与我相关
我的任务
分享
#include <iostream>
#include <time.h>
using namespace std;
int main(int argc, char** argv)
{
int istart= clock();
for (int i = 0 ; i < 1000000 ;++i)
{
char my[256];
memset(my,0,256);
}
int iend= clock();
int pos = iend - istart;
cout << pos << endl; // 输出15
istart= clock();
for (int i = 0 ; i < 1000000 ;++i)
{
char my[256] = {0};
}
iend= clock();
pos = iend - istart;
cout << pos << endl; // 输出:31
return 0;
}