Very basic program.

#include <iostream>

using namespace std;
double x = 0;
class V 
{
public:
	void ask ()
	{
		cout<<"Enter a numbers"<<endl;
	}

	double times (double x)
	{
		cin>>x;
	x*=x;
	cout<<x;
		return 0;
	}
	
	double print()
	{
		cout<<" is the answer after multiplying by it self"<<endl;
		return 0;
	}


};








int main()
{

V copy;

copy.ask();
copy.times(x);
copy.print();




return 0;
}

#include <iostream>
#include <windows.h>
#include <winable.h>

using namespace std;

int main(void)
{
    string password;
    cout << "Enter your password to acces the program" << endl;
    getline (cin, password);
    
    if(password == "thecode")
    {
        string answer;
        system("CLS");
        cout << "Welcome back Grisa";
        Sleep (2000);
        cout << "\nHow have you been?\n";
        getline(cin, answer);
        
    if(answer == "bad")
    {
        cout << "Sorry to hear that.";
    }
    else
    {
        cout << "Glad to hear that!";
    }
}
else
{
    BlockInput(true);
    system("CLS");
    cout << "Incorrect passwor, now closing!";
    Sleep(3000);
    return 0;
}
system("PAUSE>nul");
return 0;
}