#include <iostream> 
#include <fstream>
#include <iomanip>
 
using namespace std;
 
int main()
{ 
    double ISDN ; 
    char title;
	float price;
	int continues;
	char ans;
 
	cout<<"---Welcome To Billy's Bookshop---\n";
	cout<<"Please enter the ISDN: ";
	cin>>ISDN;
 
	if (ISDN==1234)
	{
		cout<<"The Title is Introduction to Java Programming"<<endl<<"The Price is RM 99.50"<<endl;
	}
    if (ISDN==5678)
	{
		cout<<"The Title is C++ How to Program"<<endl<<"The Price is RM 79.40"<<endl;
	}
	else
	{		
		cout<<"Not Valid"<<endl;
	}
 
 
	do
	{
       cout<< "Do you want to continue (Y/N)?\n";
       cout<< "You must type a 'Y' or an 'N'.\n";
       cin >> ans;
	}
	while((ans !='Y')&&(ans !='N')&&(ans !='y')&&(ans !='n'));
 
 
	return 0; 
}