간단한 Calc 만들기

Calculator.java

public class Calculator {

	private int firstNum;
	private int secondNum;
	public Calculator() {
		super();
		// TODO Auto-generated constructor stub
	}
	public Calculator(int firstNum, int secondNum) {
		super();
		this.firstNum = firstNum;
		this.secondNum = secondNum;
	}
	public int getFirstNum() {
		return firstNum;
	}
	public void setFirstNum(int firstNum) {
		this.firstNum = firstNum;
	}
	public int getSecondNum() {
		return secondNum;
	}
	public void setSecondNum(int secondNum) {
		this.secondNum = secondNum;
	}
	
	// 더하기
	public int add() {
		return firstNum + secondNum;
	}
	//빼기
	public int sub() {
		return firstNum - secondNum;
	}
	//곱하기
	public int mul() {
		return firstNum * secondNum;
	}
	//나누기
	public int div() {
		return firstNum / secondNum;
	}
}

Main.java

public class Main {
	public static void main(String[] args) {
		// Calculator 클래스를 이용해서 
		// 10, 5에 대한 사칙연산 결과 출력
		Calculator calc = new Calculator();
		calc.setFirstNum(10);
		calc.setSecondNum(5);
		
		System.out.println(calc.add());
		System.out.println(calc.sub());
		System.out.println(calc.mul());
		System.out.println(calc.div());
	}
}