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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int myStrlen(const char s[]) {
  5.     int i;
  6.     for (i = 0; s[i] != '\0'; i++);
  7.     return i;
  8. }
  9.  
  10. char *setPalindrome(const char s[]) {
  11.     int i;
  12.     int size = myStrlen(s);
  13.  
  14.     char *tmp = malloc(sizeof(char) * (2 * size + 1));
  15.     if (tmp == NULL) {
  16.         printf("ERROR: memory allocation failed\n");
  17.         return NULL;
  18.     }
  19.  
  20.     for (i = 0; i < size; i++) {
  21.         tmp[i] = s[i];
  22.     }
  23.  
  24.     for (i = 0; i < size; i++) {
  25.         tmp[size + i] = s[size - i - 1];
  26.     }
  27.  
  28.     tmp[2 * size] = '\0';
  29.  
  30.     return tmp;
  31. }
  32.  
  33.  
  34.  
  35. //メイン関数はいじる必要はありません
  36. int main(){
  37.     int i;
  38.     char nyuryoku[1024]; //入力
  39.     char *kaibun;   //回文を受け取る
  40.     scanf("%s",nyuryoku);
  41.     kaibun = setPalindrome(nyuryoku);
  42.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  43.     free(kaibun);
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin
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abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/r4mQmP
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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