C库函数 time() C库函数 strftime() C库函数 rename() C库函数 time() #include <stdio.h> #include <time.h> int main () { time_t seconds; seconds = time(NULL); printf("Hours since January 1, 1970 = %ld\n", seconds/3600); return(0); } C库函数 strftime() C库函数 rename()