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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.     char *tmp;
  12.     int len = myStrlen(s);
  13.     int i;
  14.  
  15.     tmp = (char *)malloc(sizeof(char) * (2 * len + 1));
  16.     if (tmp == NULL) {
  17.         printf("ERROR\n");
  18.         return 0;
  19.     }
  20.  
  21.     for(i = 0; i < len; i++){
  22.         tmp[i] = s[i];
  23.     }
  24.  
  25.     for(i = 0; i < len; i++){
  26.         tmp[len + i] = s[len - 1 - i];
  27.     }
  28.  
  29.     tmp[2 * len] = '\0';
  30.  
  31.     return tmp;
  32. }
  33.  
  34.  
  35. int main(){
  36.     int i;
  37.     char nyuryoku[1024];
  38.     char *kaibun;  
  39.     scanf("%s", nyuryoku);
  40.     kaibun = setPalindrome(nyuryoku);
  41.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  42.     free(kaibun);
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0.01s 5300KB
comments (?)
stdin
copy 
abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/bSgv4w
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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