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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.  
  8.     }
  9.     return i;
  10. }
  11.  
  12. char *setPalindrome(char s[]){
  13.     int i,size;
  14.     char *tmp;
  15.     size = myStrlen(s);
  16.     tmp = (char *)malloc(sizeof(char)*(2*size+1));
  17.     if(tmp == NULL){
  18.         printf("ERROR\n");
  19.         return NULL; //void型なので何も返さず終了
  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.     tmp[2*size] = '\0';
  26.     return tmp;
  27. }
  28.  
  29.  
  30. int main(){
  31.     int i;
  32.     char nyuryoku[1024]; //入力
  33.     char *kaibun;   //回文を受け取る
  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 0.01s 5284KB
comments (?)
stdin
copy 
abcd
stdout
copy 
abcd
  -> abcddcba
https://ideone.com/yX7S6y
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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