要求输入年份和月份 得出本月天数
#include<stdio.h>
void main()
{
    int year,month;
    printf("input year and month:");
    scanf("%d%d",&year,&month);
     if(month==2)
     {
         if((year%4==0&&year%100!==0)||(year%400==0))
             printf("the days of %d of %d is 29",year,month");
         else printf("the days of %d of %d is 28",year,month");
     }
 switch(month)
     {
         case 1:
         case 3:
         case 5:
         case 7:
         case 8:
         case 10:
         case 12:prtinf("the days of %d of %d is 31",year,month);break;
         case 4:
         case 6:
         case 8:
         case 11:prtinf("the days of %d of %d is 30",year,month);break;
         default:printf("error input!\n");
     }
}
10 errors,1 warning      
不太清楚错在哪里了 请指教qaq

#include<stdio.h>

 void main()

 {
     int year,month;
     printf("input year and month:");
     scanf("%d%d",&year,&month);
      if(month==2)
      {
          if((year%4==0&&year%100!=0)||(year%400==0))
              printf("the days of %d of %d is 29",year,month);
          else printf("the days of %d of %d is 28",year,month);
      }
  switch(month)
      {
          case 1:
          case 3:
          case 5:
          case 7:
          case 8:
          case 10:
          case 12:printf("the days of %d of %d is 31",year,month);break;
          case 4:
          case 6:
          case 9:
          case 11:printf("the days of %d of %d is 30",year,month);break;
          default:printf("error input!\n");
  }

 }

错的地方有点多，我就不一一说了，帮你改好了自己看吧

printf不是prtinf  基本的输出函数要记清楚！  !=(不等于要这样写)，不能写成！==   
基本的单词要记住。

谢谢您哈~

一时疏忽。。Thanks♪(･ω･)ﾉ蟹蟹~

你这个输2月份有问题的  不是天数问题 是后面跟着error input!

最终版：

#include<stdio.h>
 void main()
 {
     int year,month;
     printf("input year and month:");
     scanf("%d%d",&year,&month);
      if(month==2)
      {
          if((year%4==0&&year%100!=0)||(year%400==0))
              printf("the days of %d of %d is 29",year,month);
          else printf("the days of %d of %d is 28",year,month);
      }
    else
    {
      switch(month)
          {
              case 1:
              case 3:
              case 5:
              case 7:
              case 8:
              case 10:
              case 12:printf("the days of %d of %d is 31",year,month);break;
              case 4:
              case 6:
              case 9:
              case 11:printf("the days of %d of %d is 30",year,month);break;
              default:printf("error input!\n");
      }
    }
 }

强迫症患者的版本
#include<stdio.h>
 void main()
 {
     int year,month;
     printf("input year and month:");
     scanf("%d%d",&year,&month);
      switch(month)
          {
              case 1:printf("the days of %d of %d is 31",year,month);break;
              case 2:
                     if((year%4==0&&year%100!=0)||(year%400==0))
                      printf("the days of %d of %d is 29",year,month);
                      else printf("the days of %d of %d is 28",year,month);
                        break;
              case 3 :printf("the days of %d of %d is 31",year,month);break;
              case 4 :printf("the days of %d of %d is 30",year,month);break;
              case 5 :printf("the days of %d of %d is 31",year,month);break;
              case 6 :printf("the days of %d of %d is 30",year,month);break;
              case 7 :printf("the days of %d of %d is 31",year,month);break;
              case 8 :printf("the days of %d of %d is 31",year,month);break;
              case 9 :printf("the days of %d of %d is 30",year,month);break;
              case 10:printf("the days of %d of %d is 31",year,month);break;
              case 11:printf("the days of %d of %d is 30",year,month);break;
              case 12:printf("the days of %d of %d is 31",year,month);break;      
              default:printf("error input!\n");
      }
    }
 }

[此贴子已经被作者于2018-4-17 09:29编辑过]