#include <iostream>

using namespace std;

class customerdata
{
	private:
		int id;
		int age;
		int creditcard;
		int phonenumber;

	public:
		void fillvalues()
		{
			age = 20 + rand() % 41;						// random: 20 - 60
			creditcard = 1000 + rand() % 9000;			// random: 1000 - 9999
			phonenumber = 1000000 + rand() % 9000000;	// random: 1000000 - 9999999
		}

		void setid(int val)
		{
			id = val;
		}

		int securitypreference()
		{
			return rand() % 2;  						// returns: 0 or 1
		}

		void printsecure()
		{
			cout << "Customer id: " << id << endl;
			cout << "Customer age: " << age << endl;
			cout << endl;
		}

		void printall()
		{
			cout << "Customer id: " << id << endl;
			cout << "Customer age: " << age << endl;
			cout << "Last 4 digits of card #: " << creditcard << endl;
			cout << "Customer phone number: " << phonenumber << endl;
			cout << endl;
		}
};

int main()
{
	int input;
	int i;
	customerdata myarray[50];

	for (i=0; i<50; i++)
	{
		myarray[i].setid(i);
		myarray[i].fillvalues();
	}

	while(1)
	{
		cout << "Enter customer id (0 to 49): ";
		cin >> input;

		// 1: secure, 0: not_secure
		if (myarray[input].securitypreference() == 1)
		{
			myarray[input].printsecure();
		}
		else
		{
			myarray[input].printall();
		}
	}

	return 0;
}