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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. char *setPalindrome(char s[]) {
  12.     int len = myStrlen(s); 
  13.     char *tmp;             
  14.  
  15.     tmp = (char*)malloc((2 * len + 1) * sizeof(char)); 
  16.  
  17.     if (tmp == NULL) {
  18.  
  19.         printf("Memory allocation failed\n");
  20.         return NULL;
  21.     }
  22.  
  23.     for (int i = 0; i < len; i++) {
  24.         tmp[i] = s[i];
  25.     }
  26.  
  27.     for (int i = 0; i < len; i++) {
  28.         tmp[len + i] = s[len - 1 - i];
  29.     }
  30.  
  31.     tmp[2 * len] = '\0';
  32.  
  33.     return tmp; 
  34. }
  35.  
  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. }
Success #stdin #stdout 0.01s 5276KB
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https://ideone.com/cIwIhc
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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