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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int myStrlen(char s[])
  5. {
  6.     int i;
  7.     for(i=0;s[i]!='\0';i++);
  8.     return i;
  9. }
  10.  
  11. // 関数の中でtmpに対してmallocして
  12. // そこに回文を代入してreturnで返しましょう
  13. char *setPalindrome(char s[])
  14. {
  15.     int i;
  16.     int count = myStrlen(s);
  17. 	char *tmp;
  18. 	tmp = (char*)malloc(sizeof(char)*(2*count+1));
  19.     for(i=0;i<count;i++)
  20.     {
  21.         tmp[i] = s[i];
  22.     }
  23.     for(i=0;i<count;i++)
  24.     {
  25.         tmp[count+i] = s[count-1-i];
  26.     }
  27.     tmp[2 * count] = '\0';
  28.     return tmp;
  29. }
  30.  
  31.  
  32. //メイン関数はいじる必要はありません
  33. int main(){
  34.     int i;
  35.     char nyuryoku[1024]; //入力
  36.     char *kaibun;   //回文を受け取る
  37.     scanf("%s",nyuryoku);
  38.     kaibun = setPalindrome(nyuryoku);
  39.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  40.     free(kaibun);
  41.     return 0;
  42. }
  43.  
Success #stdin #stdout 0s 5304KB
comments (?)
stdin
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abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/JjGkiS
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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