为什么编译没有报错，但一运行就错误。。

Question

#include<stdio.h>#include<string.h>#include<stdlib.h>struct time{ int hour; int minute; int second;};struct time TimeUpdate(struct time now);int main(int argc,char const argv[]){ int i; struct time testtimes[5]={{23,59,59},{12,52,36},{06,12,58},{00,00,00},{25,01,26}}; for(i=0;i<5;i++) { printf("Time is %02d：%02d：%02d\n",testtimes[i].hour ,testtimes[i].minute ,testtimes[i].second ); testtimes[i]=TimeUpdate(testtimes[i]); printf("...one second after the now time is %02d：%02d：%02d\n",testtimes[i].hour ,testtimes[i].minute ,testtimes[i].second); getchar();  } return 0;}struct time TimeUpdate(struct time now){ if(now.hour>=0&&now.hour<24) {  if(now.second>=60)  {   now.minute=now.minute +now.second /60;   now.second=now.second-60*(now.second/60);        if(now.minute>=60)     {     now.hour=now.hour+now.minute/60;     now.minute=now.minute-60*(now.minute/60);     }  }  printf("您输入的标准时间格式是 %02d：%02d：%02d\n",now.hour,now.minute ,now.second );  ++now.second;  if(now.second ==60)  {   now.second=0;   ++now.minute;   if(now.minute==60)   {    now.minute=0;    ++now.hour;    if(now.hour==24)    {     now.hour =0;    }   }  }    } else {  printf("时间输入有误！\n"); }}

Answer 1

错误的提示是什么？

我试着运行了一下，可以运行，结果如下：

Answer 2

添加一个retern now；