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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int myStrlen(char s[]){
  5.     int i;
  6.     for(i = 0; s[i] != '\0'; i++);
  7.     return i;
  8. }
  9.  
  10. char *setPalindrome(char s[]){
  11.     int len = myStrlen(s);
  12.     char *tmp = malloc((2 * len + 1) * sizeof(char));
  13.     if(tmp == NULL){
  14.         perror("malloc");
  15.         exit(EXIT_FAILURE);
  16.     }
  17.  
  18.     for(int i = 0; i < len; i++){
  19.         tmp[i] = s[i];
  20.     }
  21.     for(int i = 0; i < len; i++){
  22.         tmp[len + i] = s[len - 1 - i];
  23.     }
  24.     tmp[2 * len] = '\0';
  25.  
  26.     return tmp;
  27. }
  28.  
  29. int main(){
  30.     char nyuryoku[1024];
  31.     char *kaibun;
  32.     scanf("%s", nyuryoku);
  33.     kaibun = setPalindrome(nyuryoku);
  34.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  35.     free(kaibun);
  36.     return 0;
  37. }
Success #stdin #stdout 0.01s 5296KB
comments (?)
stdin
copy 
abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/pSDERZ
language:
C (gcc 8.3)
created:
15 days ago
visibility:
public

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