haroun yfz

package com.arithmetique;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        while (true){
            Scanner scan = new Scanner(System.in);
            byte opt = 0;
            float fstChoice, secChoice;
            System.out.println();
            System.out.println("1 - Somme de deux réels ");
            System.out.println("2- Soustraction de deux réels");
            System.out.println("3- Multiplication de deux réels");
            System.out.println("4 - Division de deux réels");
            System.out.println("5- Sortie du programme");
            System.out.println();
            while (opt < 1 || opt > 5){
                System.out.println("option: ");
                opt = scan.nextByte();
            }
            if (opt == 5) break;
            System.out.println("premier Choix: ");
            fstChoice = scan.nextInt();
            if (opt != 4){
                System.out.println("deuxieme Choix: ");
                secChoice = scan.nextInt();
            }
            else {
                do {
                    System.out.println("deuxieme Choix: ");
                    secChoice = scan.nextInt();
                } while (secChoice == 0);
            }
            float res;
            switch (opt){
                case 1:
                    res = fstChoice + secChoice;
                    break;
                case 2:
                    res = fstChoice - secChoice;
                    break;
                case 3:
                    res = fstChoice * secChoice;
                    break;
                default:
                    res = fstChoice / secChoice;
            }
            System.out.println(res);
        }
    }
}