package swa.prakt3;

public class ArithmeticSubstraction extends ArithmeticOperation {

	public ArithmeticSubstraction(ArithmeticExpression operand1,
			ArithmeticExpression operand2) {
		super(operand1, operand2);
		operationSign = "-";
	}
	@Override
	public Number doOperation(Number op1, Number op2) {
		return op1.doubleValue() - op2.doubleValue() ;
	}
}