&C语言风格
#include <stdio.h> #include <time.h> #ifdef _WIN32 #include <Windows.h> #else #include <unistd.h> #endif int main () { time_t start_t, end_t; double diff_t; printf("程序启动... "); time(&start_t); printf("休眠 5 秒... "); Sleep(5000); //5000ms time(&end_t); diff_t = difftime(end_t, start_t); printf("执行时间 = %f ", diff_t); printf("程序退出... "); system("pause"); return(0); }
&C++风格
#include <iostream> #include <ctime> #include <Windows.h> using namespace std; //C 库函数 double difftime(time_t time1, time_t time2) 返回 time1 和 time2 之间相差的秒数 (time1 - time2)。 //这两个时间是在日历时间中指定的,表示了自纪元 Epoch(协调世界时 UTC:1970-01-01 00:00:00)起经过的时间 int main() { time_t start_t, end_t; time(&start_t); Sleep(5000); //Sleep为Windows.h的函数 time(&end_t); cout << start_t << endl; cout << end_t << endl; cout << difftime(end_t, start_t) << endl; system("pause"); return 0; }