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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. int main(void)
  5. {
  6.     char character;
  7.  
  8.     printf("Enter a character: ");
  9.     scanf("%c", &character);
  10.  
  11.     printf("\nisblank: %d\n", isblank(character));
  12.     printf("isdigit: %d\n", isdigit(character));
  13.     printf("isalpha: %d\n", isalpha(character));
  14.     printf("isalnum: %d\n", isalnum(character));
  15.     printf("isxdigit: %d\n", isxdigit(character));
  16.  
  17.     printf("islower: %d\n", islower(character));
  18.     printf("isupper: %d\n", isupper(character));
  19.  
  20.     printf("isspace: %d\n", isspace(character));
  21.     printf("iscntrl: %d\n", iscntrl(character));
  22.     printf("ispunct: %d\n", ispunct(character));
  23.     printf("isprint: %d\n", isprint(character));
  24.     printf("isgraph: %d\n", isgraph(character));
  25.  
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5352KB
comments (?)
stdin
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Standard input is empty
stdout
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Enter a character: 
isblank: 0
isdigit: 0
isalpha: 0
isalnum: 0
isxdigit: 0
islower: 0
isupper: 0
isspace: 0
iscntrl: 2
ispunct: 0
isprint: 0
isgraph: 0
https://ideone.com/pn1g02
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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