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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4.  
  5. int myStrlen(char s[]) {
  6.     int i;
  7.     for (i = 0; s[i] != '\0'; i++);
  8.     return i;
  9. }
  10.  
  11.  
  12. char *setPalindrome(char s[]) {
  13.     int len = myStrlen(s);
  14.     int i;
  15.     char *tmp = malloc(sizeof(char) * (2 * len + 1)); 
  16.     if (tmp == NULL) {
  17.         return NULL;
  18.     }
  19.  
  20.     for (i = 0; i < len; i++) {
  21.         tmp[i] = s[i];
  22.     }
  23.  
  24.  
  25.     for (i = 0; i < len; i++) {
  26.         tmp[len + i] = s[len - 1 - i];
  27.     }
  28.  
  29.     tmp[2 * len] = '\0'; 
  30.     return tmp;
  31. }
  32.  
  33.  
  34. int main() {
  35.     char nyuryoku[1024]; 
  36.     char *kaibun;         
  37.     scanf("%s", nyuryoku);
  38.     kaibun = setPalindrome(nyuryoku);
  39.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  40.     free(kaibun);
  41.     return 0;
  42. }
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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efgh
stdout
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efgh
  -> efghhgfe
https://ideone.com/8RZoso
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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