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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4.  
  5. int strLength(char *s){
  6.     int len = 0;
  7.     while(s[len] != '\0') len++;
  8.     return len;
  9. }
  10.  
  11.  
  12. char *setPalindrome(char *s){
  13.     int len = strLength(s);
  14.  
  15.  
  16.     char *p = (char *)malloc(sizeof(char) * (len * 2 + 1));
  17.     if(p == NULL){
  18.         printf("ERROR\n");
  19.         return NULL;
  20.     }
  21.  
  22.  
  23.     for(int i = 0; i < len; i++){
  24.         p[i] = s[i];
  25.     }
  26.  
  27.  
  28.     for(int i = 0; i < len; i++){
  29.         p[len + i] = s[len - 1 - i];
  30.     }
  31.  
  32.  
  33.     p[len * 2] = '\0';
  34.  
  35.     return p;
  36. }
  37.  
  38. int main(void){
  39.     char buf[200];
  40.     scanf("%s", buf);
  41.  
  42.     char *pal = setPalindrome(buf);
  43.  
  44.     printf("%s\n", pal);
  45.  
  46.     free(pal);
  47.  
  48.     return 0;
  49. }
  50.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/95VQRQ
language:
C (gcc 8.3)
created:
23 hours ago
visibility:
public

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