//실습2 <고급>
#include <stdio.h>
char swit(char *,int);

int main()
{
 int index = 0;
 char hello[20] = "hello world!!!";
 swit(hello, index);
 printf("n");
 
 return 0;
}
char swit(char hello[],int index)
{
 if(hello[index] == '')
  return 0;
 if(index >= 0)
 {
  (swit(hello,index+1));
  printf("%c",hello[index]);
 }

}