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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. char *setPalindrome(char s[]){
  11.     int len = myStrlen(s);
  12.     int totalLen = len * 2;
  13.     char *tmp = (char *)malloc((totalLen + 1) * sizeof(char)); // +1 for '\0'
  14.     int i;
  15.  
  16.     for(i = 0; i < len; i++){
  17.         tmp[i] = s[i];
  18.     }
  19.  
  20.     for(i = 0; i < len; i++){
  21.         tmp[len + i] = s[len - 1 - i];
  22.     }
  23.  
  24.     tmp[totalLen] = '\0';
  25.  
  26.     return tmp;
  27. }
  28.  
  29. // メイン関数はいじる必要ありません
  30. int main(){
  31.     int i;
  32.     char nyuryoku[1024]; 
  33.     char *kaibun;   
  34.     scanf("%s", nyuryoku);
  35.     kaibun = setPalindrome(nyuryoku);
  36.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  37.     free(kaibun);
  38.     return 0;
  39. }
  40.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
abcd
stdout 
abcd
  -> abcddcba
https://ideone.com/xeGi4v
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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