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  1. #include <stdio.h>
  2. int main()
  3. {
  4.     char ch;
  5.     printf("请输入一个字符：");
  6.     scanf("%c", &ch);
  7.  
  8.     if (ch >= '0' && ch <= '9')
  9.     {
  10.         printf("这是数字字符\n");
  11.     }
  12.     else if (ch >= 'A' && ch <= 'Z')
  13.     {
  14.         printf("这是大写字母\n");
  15.     }
  16.     else if (ch >= 'a' && ch <= 'z')
  17.     {
  18.         printf("这是小写字母\n");
  19.     }
  20.     else if (ch == ' ')
  21.     {
  22.         printf("这是空格\n");
  23.     }
  24.     else
  25.     {
  26.         printf("这是其他字符\n");
  27.     }
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0s 5324KB
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stdin
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请输入一个字符：这是小写字母
https://ideone.com/r3huyA
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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