// Sample program using a pointer to manipulate character array

#include <iostream.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>

int invalid(char *s1, char *s2);

int main()
{
	char pass[15];

	clrscr();
	cout << "Enter Password: "<< endl;
	gets(pass);


	if ( invalid(pass, "secret") ){
		cout << "Unauthorized user!" << endl;
		getch();
		exit(1);
	}

	cout << "Password validated!!!";
	getch();
	return 0;
}


int invalid(char *s1, char *s2)
{
	while (*s1)
		if (*s1 - *s2)
			return *s1 - *s2;
		else{
			s1++;
			s2++;
		}

	return 0;
}