#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
void f(char *p)
{
	if (*p == ‘\0‘)
	{
		return;
	}
	else
	{
		f(p + 1);
		printf("%c\n", *p);
	}

}

void main()
{
	char *p = "abcd";
	f(p);
	system("pause");
 }