不管怎么输出都带一个  other char

#include <stdio.h>
int main(void)
{
    char ch;
    while(ch != '@',ch = getchar())
    {
        if(ch >= 'a' && ch <= 'z')
            printf("lowercase\n");
        else
            if(ch >= 'A' && ch <= 'Z')
                printf("uppercase\n");
            else
                if(ch >= '0' && ch <= '9')
                    printf("digital\n");
                else
                    printf("other char\n");
    }
    return 0;
}


j
lowercase
other char

要养成打括号的好习惯。

回车符'\n'

另外
char ch;
while(ch != '@',
还没赋值就比较呀

他后面有啊

我的程序上运行的是正确的

#include <stdio.h>
  int main(void)
  {
      char ch;
      while(ch = getchar() != EOF)
      {
          getchar();
         if(ch != '@')
          if(ch >= 'a' && ch <= 'z')
              printf("lowercase\n");
          else
              if(ch >= 'A' && ch <= 'Z')
                  printf("uppercase\n");
              else
                  if(ch >= '0' && ch <= '9')
                      printf("digital\n");
                  else
                      printf("other char\n");
      }
      return 0;
  }

[此贴子已经被作者于2016-12-5 22:14编辑过]

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[此贴子已经被作者于2016-12-5 22:14编辑过]