[JAVA][사칙연산]

JAVA사칙연산 프로그램

public class Operation {
 
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n1;
        int n2;
        String s1;
 
 
 
        while (true) {
            System.out.println("계산하실 형식을 입력해 주세요(ex1-1)");
            n1=sc.nextInt();
            s1=sc.next();
            n2=sc.nextInt();
 
            int result=0;
 
            switch (s1) {
            case "+":
                result=n1+n2;
                break;
            case "-":
                result=n1-n2;
                break;
            case "/":
                result=n1/n2;
                break;
            case "%":
                result=n1%n2;
                break;
            default:
                System.out.println("연산이 틀렸습니다");
                break;
            }
 
            System.out.println(n1+" "+s1+" "+n2+" = "+result);
            System.out.println("연산을 계속하고 싶으면 1번/아니면2번을 눌려주세요");
            
            int ch=sc.nextInt();
            if(ch==1) {
                System.out.println("연산을 진행해주세용");
            }else if(ch==2){
                System.out.println("시스템을 종료합니다");
                break;
            }        
        }
    }
}