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  1.  
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. int myStrlen(char s[]) {
  6.     int i;
  7.     for(i = 0; s[i]!= '\0'; i++);
  8.     return i;
  9. }
  10.  
  11. char *setPalindrome(char s[]) {
  12.     int n = myStrlen(s);                  
  13.     int size = 2 * n;                
  14.     char *tmp = (char *)malloc(sizeof(char) * (size+1));
  15.     if(tmp == NULL) {
  16.         printf("ERROR\n");
  17.         return 0;
  18.     }
  19.         int i;
  20.     for(i = 0; i < n; i++) {
  21.         tmp[i] = s[i];
  22.     }
  23.         for(i = 0; i < n; i++) {
  24.         tmp[n + i] = s[n - 1 - i];
  25.     }
  26.         tmp[size] = '\0';
  27.  
  28.          return tmp;
  29. }
  30.  
  31. int main() {
  32.     int i;
  33.     char nyuryoku[1024];  
  34.     char *kaibun;         
  35.     scanf("%s",nyuryoku);               
  36.     kaibun = setPalindrome(nyuryoku);    
  37.     printf("%s\n  -> %s\n",nyuryoku,kaibun); 
  38.     free(kaibun);  
  39.     return 0;
  40. }
  41.  
  42.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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abcd
stdout
copy 
abcd
  -> abcddcba
https://ideone.com/w3yrIZ
language:
C (gcc 8.3)
created:
6 days ago
visibility:
public

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