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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. // 関数の中でtmpに対してmallocして
  11. // そこに回文を代入してreturnで返しましょう
  12. char *setPalindrome(char s[]){
  13. 	char *tmp;
  14.  int i, len;
  15.  
  16.     len = myStrlen(s);
  17.  
  18.  
  19.     tmp = (char *)malloc((2 * len + 1) * sizeof(char));
  20.  
  21.     for(i = 0; i < len; i++){
  22.         tmp[i] = s[i];
  23.     }
  24.  
  25.     for(i = 0; i < len; i++){
  26.         tmp[len + i] = s[len - 1 - i];
  27.     }
  28.  
  29.     tmp[2 * len] = '\0';
  30.  
  31.     return tmp;
  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 0s 5316KB
comments (?)
stdin
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abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/yYEfHq
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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