二十五岁时我们都一样愚蠢、多愁善感，喜欢故弄玄虚，可如果不那样的话，五十岁时也就不会如此明智。
标题：C库函数 difftime()
C库函数 difftime()
#include <stdio.h> #include <time.h> int main () { time_t start_t, end_t; double diff_t; printf("Starting of the program...\n"); time(&start_t); printf("Sleeping for 5 seconds...\n"); sleep(5); time(&end_t); diff_t = difftime(end_t, start_t); printf("Execution time = %f\n", diff_t); printf("Exiting of the program...\n"); return(0); }
