为什么会显示“选择”两次？ [英] Why does it show "Choose" twice?

问题描述

import java.util.Scanner;
public class Steam{

    public static void main(String[] args){
        int i=0,j=0;
        Scanner input = new Scanner(System.in);
        double ac[]={3,5,1.5,2};
        double a[] = new double[100];
        String cont, choose;
        double pay=0, hour=0;
        do{
            pay=0;
            System.out.println("Select the following: ");
            System.out.println("1. steam & sauna ($3)");
            System.out.println("2. Massage ($5)");
            System.out.println("3. Soft Drink ($1.5)");
            System.out.println("4. Fast Food ($2)");
            System.out.println("5. Payment");
            System.out.println("6. Exit");

            do{
                System.out.print("Choose: ");
                choose=input.nextLine();
                if(choose.equalsIgnoreCase("6")) break;
                if(choose.equalsIgnoreCase("1")){
                    a[0]=ac[0];
                }else if(choose.equalsIgnoreCase("2")){
                    a[0]=0;
                    System.out.print("Input hour(s): ");
                    hour=input.nextDouble();
                    a[1]=ac[1]*hour;
                }else if(choose.equalsIgnoreCase("3")){
                    a[2]=ac[2];
                }else if(choose.equalsIgnoreCase("4")){
                    a[3]=ac[3];
                }else if(choose.equalsIgnoreCase("5")){
                    for(j=0; j<i; j++){
                        pay+=a[j];
                        a[j]=0;
                    }
                    System.out.println("\nTotal Payment: $"+ pay);
                    break;
                }
                i++;
            }while(true);
            if(choose.equalsIgnoreCase("6")) break;
            System.out.print("Do you want to continue? (y/n): ");
            cont=input.nextLine();
        }while(cont.equalsIgnoreCase("y"));
    }
}

推荐答案

3））;
系统。< span class =code-keyword> out .println（ 2.按摩（

3)"); System.out.println("2. Massage (

5））;
系统。 out .println（ 3.软饮料（

5)"); System.out.println("3. Soft Drink (

1.5））;
系统。 out .println（ 4.快餐（

1.5)"); System.out.println("4. Fast Food (

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