public class A {
	// attribute 
	private int value;

	// default constructor: set the object's value to 0

	// specific constructor: set the object's value to n

	// getValue(): returns the object's value

	// setValue(): takes a single parameter of type int. Sets the object's
	// value to the value of the parameter

	// equals(): takes a single paramteter of type A. Returns whether the
	// object has the same value as the other object

	// isPositive(): reports whether the object's value is at least 0

	// zero(): causes the object's value to be set to 0

	// add(): takes a single parameter of type A. Returns a new object whose
	// value is the sum of the two object's values

	// toString(): returns a representation of the object
	public String toString() {
		String representation = "A(" + value + ")";
		return representation;
	}
}