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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. char *setPalindrome(char s[]){
  6.     int length = strlen(s); //文字列の長さの取得
  7.     char *pal = (char*)malloc(sizeof(char) * (2 * length));
  8.  
  9.     if(pal == NULL)return NULL;
  10.  
  11.     strcpy(pal, s); //文字列のコピー(s -> pal)
  12.  
  13.     for(int i=0; i < length - 1; i++){
  14.         *(pal + length + i) = s[length - 2 - i];
  15.     }
  16.     *(pal + 2 * length - 1) = '\0';
  17.  
  18.     return pal;
  19. }
  20. int main(void){
  21.     char enter[1024];
  22.     scanf("%s", enter);
  23.     char *result = setPalindrome(enter);
  24.     printf("%s", result);
  25.     free(result);
  26.     return 0;
  27. }
Success #stdin #stdout 0s 5280KB
comments (?)
stdin 
abc
stdout 
abcba
https://ideone.com/5d2JMY
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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