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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.  
  11.  
  12. // 関数の中でtmpに対してmallocして
  13. // そこに回文を代入してreturnで返しましょう
  14.  
  15.  
  16. char *setPalindrome(char s[]){
  17. 	int i;
  18.  
  19. 	char *tmp;
  20. 	int a=myStrlen(s);
  21. 	tmp=(char*)malloc(sizeof(char)*(a*2+1));
  22.     for(i = 0; i < a; i++) {
  23.         tmp[i] = s[i];
  24.     }
  25.     for(i = 0; i < a; i++) {
  26.         tmp[a + i] = s[a - i - 1];
  27.     }
  28.  
  29.  
  30.     tmp[2 * a] = '\0'; 
  31.     return tmp;
  32. }
  33.  
  34. 	int main(){
  35.     int i;
  36.     char nyuryoku[1024]; //入力
  37.     char *kaibun;   //回文を受け取る
  38.     scanf("%s",nyuryoku);
  39.     kaibun = setPalindrome(nyuryoku);
  40.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  41.     free(kaibun);
  42.     return 0;
  43. }
  44.  
  45.  
  46.  
Success #stdin #stdout 0s 5292KB
comments (?)
stdin 
abc
stdout 
abc
  -> abccba
https://ideone.com/pIeMUb
a b c
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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