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  1. #include <stdio.h>
  2.  
  3. typedef int bool;
  4. #define true 1
  5. #define false 0
  6.  
  7. bool is_palindrome(const char *message)
  8.  {
  9.      char *p, *p2;
  10.      bool palindrome = true;
  11.  
  12.      p = message;
  13.      p2 = message;
  14.  
  15.  
  16.          while(*p)p++;
  17.  
  18.          while(*p2)
  19.          {
  20.              while(!isalpha(*p)) p--;
  21.              while(*p2 !='\0' && !isalpha(*p2)) p2++;
  22.              if (*p2 == '\0')
  23.             	break;
  24.  
  25.              if (toupper(*p) != toupper(*p2))
  26.              {
  27.               palindrome = false;
  28.               break;
  29.              }else
  30.              {
  31.                  p--;
  32.                  p2++;
  33.              }
  34.  
  35.          }
  36.  
  37.      return palindrome;
  38.  }
  39.  
  40. int main(void) {
  41. 	printf("Is palindrome %d", is_palindrome("lived, devil."));
  42. 	return 0;
  43. }
  44.  
Success #stdin #stdout 0s 10320KB
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Standard input is empty
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Is palindrome 1
https://ideone.com/1KaOMR
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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