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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. // 動的メモリを確保して回文を返す
  11. char *setPalindrome(char s[]){
  12.     int len = myStrlen(s);
  13.     int i;
  14.  
  15.     char *tmp = malloc((len * 2 + 1) * sizeof(char));
  16.     for(i = 0; i < len; i++){
  17.         tmp[i] = s[i];
  18.     }
  19.     for(i = 0; i < len; i++){
  20.         tmp[len + i] = s[len - 1 - i];
  21.     }
  22.  
  23.     tmp[len * 2] = '\0';
  24.     return tmp;
  25. }
  26.  
  27.  
  28. int main(){
  29.     char nyuryoku[1024];
  30.     char *kaibun;
  31.  
  32.     scanf("%s", nyuryoku);
  33.     kaibun = setPalindrome(nyuryoku);
  34.  
  35.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  36.  
  37.     free(kaibun);
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
abcd
stdout
copy 
abcd
  -> abcddcba
https://ideone.com/Z9xm1m
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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