9일차 calculator

import java.util.Scanner;



public class Calculator {

	public static void main(String[] args) {

		Scanner scan=new Scanner(System.in);

		System.out.println("1.더하기 2.빼기 3.곱하기4.나누기");
		int oper =scan.nextInt();

		System.out.print("숫자를 2번 입력하세요");

		int a= scan.nextInt();
		int b= scan.nextInt();

		//System.out.println("oper="+oper);
		//System.out.println("a+b= "+(a+b));

		/*if문과 swith문 등을 사용해서 구현하세요*/
		if(oper==1){
			System.out.println("a+b="+(a+b) );
		}else if(oper==2){
			System.out.println("a-b="+(a-b) );
		}else if(oper==3){
			System.out.println("a*b="+(a*b) );
		}else if(oper==4){
			System.out.println("a/b="+(a/b) );
		}	
	}
}

import java.util.Scanner;

public class Calculator {

	public static void main(String[] args) {

		Scanner scan=new Scanner(System.in);

		System.out.println("1.더하기 2.빼기 3.곱하기4.나누기");
		int oper =scan.nextInt();

		System.out.print("숫자를 2번 입력하세요");

		int a= scan.nextInt();
		int b= scan.nextInt();

		//System.out.println("oper="+oper);
		//System.out.println("a+b= "+(a+b));

		/*if문과 swith문 등을 사용해서 구현하세요*/
		int result=0;
		switch(oper){
		case 1:result=a+b;
		break;
		case 2:result=a-b;
		break;
		case 3:result=a*b;
		break;
		case 4:result=a/b;
		break;

		}
		System.out.println("결과값 "+result);
		/* 내가 한거
		 * switch(oper){
		case 1:
			System.out.println("a+b= "+(a+b));
			break;
		case 2:
			System.out.println("a-b= "+(a-b));
			break;
		default :
			System.out.println("a*b= "+(a*b));


		}*/
	}
}