//  GEORGE:  Helps you do simple Boolean algebra by
//			printing out a truth table of an expression
// By Dick.
// This program is the first (very dumb) prototype...
// It is named for George Boole who invented this stuff.

#include <iostream.h>

//On older C++ compilers you may need to uncomment the next two lines
//const int true=1;
//const int false=0;

int expr(int p, int q)//The expression you want to evaluate
{
	return p && q; //change this line
}

int main()
{
	//uses
		void put_line(int p, int q);//in: p,q are truth values
			// to print a line of a truth table
	cout << "  P    Q     Expr(P,Q)\n";
	put_line( true, true );
	put_line( true, false);
	put_line(false, true );
	put_line(false, false);

	return 0;
}

void put_line(int p, int q)//in: p,q are truth values
{
	// Use the following functions
		void put_bool(int);// outputs as a True or False string
		int expr(int, int);// expression being tabulated
	put_bool(p);
	put_bool(q);
	put_bool(expr(p,q));
	cout<<endl;

	return;
}
void put_bool(int p)
{
	if( p == true )
		cout << " True   ";
	else if( p == false )
		cout << " False  ";
	else
		cout << " Error  ";   // Illogical, Captain

	return;
}