/* File: FullAdder.java
   For Lab4a, CMSC 220, Fall 1998, U.Wolz, Oct. 1998
*/

// Read through this code and add appropriate comments.

public class FullAdder {
	private boolean bit1;
	private boolean bit2;
	private boolean carryBit;
	
	
	public FullAdder(boolean b1, boolean b2, boolean c) {
		bit1 = b1;
		bit2 = b2;
		carryBit = c;
	}
	
	// Insert the boolean function that should be returned for the sum.
	public boolean sum () {
	}
	
	// Insert the boolean function that should be returned for the carry.
	public boolean carry() {
	
		return 	((!carryBit && bit1 && bit2) ||
				(carryBit && !bit1 && bit2) ||
				(carryBit && bit1 && !bit2) ||
				(carryBit && bit1 && bit2));

	}
		
	private boolean XOR(boolean x, boolean y) {
		return (!x && y) || (x && !y);
	}
	
	public void setBits(boolean b1, boolean b2, boolean c) {
		bit1 = b1;
		bit2 = b2;
		carryBit = c;
	}
}