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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. 	//以下に必要な宣言を含めて書いてください
  15. 	int i,j;
  16.   	int len = myStrlen(s);
  17.  
  18.     tmp = (char*)malloc(sizeof(char) * (len * 2 + 1));
  19.  
  20.     if (tmp == NULL) {
  21.         return NULL;
  22.     }
  23.  
  24.     for(i = 0; i < len; i++) {
  25.         tmp[i] = s[i];
  26.     }
  27.  
  28.     for(j = 0; j < len; j++) {
  29.         tmp[i + j] = s[len - 1 - j];
  30.     }
  31.  
  32.     tmp[len * 2] = '\0';
  33.  
  34.     return tmp;
  35. }
  36.  
  37.  
  38. //メイン関数はいじる必要はありません
  39. int main(){
  40.     int i;
  41.     char nyuryoku[1024]; //入力
  42.     char *kaibun;   //回文を受け取る
  43.     scanf("%s",nyuryoku);
  44.     kaibun = setPalindrome(nyuryoku);
  45.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  46.     free(kaibun);
  47.     return 0;
  48. }
  49.  
Success #stdin #stdout 0s 5280KB
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avkaebhvjk
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avkaebhvjk
  -> avkaebhvjkkjvhbeakva
https://ideone.com/fOYAr9
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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