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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 i,size;
  12.     char *tmp;
  13.     size = myStrlen(s);
  14.  
  15.     tmp = (char *)malloc(sizeof(char)*(2*size+1));
  16.  
  17.       if(tmp == NULL){
  18.         printf("ERROR\n");
  19.         return NULL; 
  20.     }
  21.     for(i=0;i<size;i++)
  22.     tmp[i] = s[i];
  23.       for(i=0;i<size;i++) 
  24.         tmp[i+size] = s[size-i-1];
  25.  
  26.     tmp[2*size] = '\0';
  27.     return tmp;
  28. }
  29.  
  30.  
  31. int main(){
  32.     int i;
  33.     char nyuryoku[1024]; //入力
  34.     char *kaibun;   //回文を受け取る
  35.     scanf("%s",nyuryoku);
  36.     kaibun = setPalindrome(nyuryoku);
  37.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  38.     free(kaibun);
  39.     return 0;
  40. }
  41.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
copy 
abcd
stdout
copy 
abcd
  -> abcddcba
https://ideone.com/Qlkr5e
language:
C (gcc 8.3)
created:
9 days ago
visibility:
public

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