/*编写一个程序显示当前时间*/
/*
/*Display the current date and time in one format*/
#include<stdio.h>
#include<time.h>
int main(void)
{
time_t current = time(NULL);
struct tm *ptr;
char date_time[21];
int hour;
char am_or_pm;
/*Print date and time in default format*/
puts(ctime(¤t));
/*Print date and time, using printf to format*/
strftime(date_time, sizeof(date_time), "%m-%d-%y %I:%M%P\n", localtime(¤t));
puts(date_time);
return 0;
}
/*clock函数的用法*/
#include<stdio.h>
#include<time.h>
int main(void)
{
clock_t start_clock = clock();
printf("Processor time used:%g sec.\n", (clock() - start_clock) / (double) CLOCKS_PER_SEC);
return 0;
}