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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. char *setPalindrome(char s[]){
  12.     int len = myStrlen(s);
  13.     int total = len * 2;       
  14.     char *tmp;
  15.  
  16.     tmp = (char *)malloc((total + 1) * sizeof(char));
  17.     if(tmp == NULL){
  18.         return NULL;
  19.     }
  20.  
  21.     for(int i = 0; i < len; i++){
  22.         tmp[i] = s[i];
  23.     }
  24.  
  25.     for(int i = 0; i < len; i++){
  26.         tmp[len + i] = s[len - 1 - i];
  27.     }
  28.  
  29.     tmp[total] = '\0';
  30.     return tmp;
  31. }
  32.  
  33. int main(){
  34.     char nyuryoku[1024]; 
  35.     char *kaibun;        
  36.     scanf("%s", nyuryoku);
  37.  
  38.     kaibun = setPalindrome(nyuryoku);
  39.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  40.  
  41.     free(kaibun);
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0s 5312KB
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abc
stdout
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abc
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https://ideone.com/xQoCdq
language:
C (gcc 8.3)
created:
7 days ago
visibility:
public

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