/*计算下一秒时间*/
#include<stdio.h>
#include<stdlib.h>

struct time{
       int hour;
       int minute;
       int second;
       };

struct time readTime();
struct time nextTime(struct time t);

int main()
{
    struct time nowTime,next_time;

    nowTime = readTime();
    next_time = nextTime(nowTime);

    printf("nowTime = %d:%d:%d\n",nowTime.hour,nowTime.minute,nowTime.second);
    printf("next_time = %d:%d:%d\n",next_time.hour,next_time.minute,next_time.second);

    system("PAUSE");
    return 0;
}
struct time readTime()
{
    struct time t;
    int error;

    do{
          error = 0;
          scanf("%d:%d:%d",t.hour,t.minute,t.second);

          if(t.hour<0||t.hour>23)
             {
             printf("小时数据错误：0~23！\n");
             error = 1;
             }
          if(t.minute<0||t.minute>59)
          {
              printf("分钟数据错误:0~59!\n");
              error = 1;
          }
          if(t.second<0||t.second>59)
          {
              printf("秒钟数据错误:0~59!\n");
              error = 1;
          }
          if(error)
              printf("重新输入！\n");
          }while(error);
         

          return t;
}

struct time nextTime(struct time t)
{
    t.second++;
    if(t.second>59)
    {
        t.second = 0;
        t.minute++;
        if(t.minute>59)
        {
            t.minute = 0;
            t.hour++;
            if(t.hour>23)
              t.hour = 0;
        }
    }

    return t;

在线等一小时。。。

。。。scanf啊scanf，果然我就是个眼科大夫，少了取址符啊

楼上正解，scanf("%d:%d:%d",&t.hour,&t.minute,&t.second);这样应该就可以了

最好那个函数没有}？

少一个括号

3Q啦。。。汗。。低级错误。。