java - 循环计算 - Java

Question

我无法根据客户购买的瓶子数量来计算他们支付的价格。对于购买的任意数量的瓶子，它都会返回 14 美元的值(value)。请参阅下面的 Java 代码:

// PriceCalculator class that calculates the prices for customers
// counter controlled repetition

import java.util.Scanner; // program uses class Scanner

public class PriceCalculator
{
private String beginSale; // name of shop this price is calculated

// constructor initializes beginSale
public PriceCalculator( String name )
{
    beginSale = name; // initializes shopName
} // end constructor

// method to set the shop name
public void setBeginSale (String name )
{
    beginSale = name; // set the welcome address
} // end method setBeginSale

// method to retrieve the welcome address
public String getBeginSale()
{
    return beginSale;
} // end method getBeginSale

// display a welcome message to the shopper
public void displayMessage ()
{
    // getBeginSale gets the thank you address
    System.out.printf( "Welcome to Price Calculator for Purchasing Wines at %s!\n",
        getBeginSale() );
} // end method displayMessage

// determine charges based on 5 customers who shopped
public void calculatePrice()
{
    // create scanner to obtain input from command window
    Scanner input = new Scanner( System.in );

    int basePrice; // base price of a bottle of wine
    String customer; // name of customer
    int gradeCounter; // number of customers to be entered next
    int bottles; // number of bottles purchased
    double discount; // discount value on the number of bottles
    double rate;
    double total; // total costs of wine purchased

    // initialization phase
    basePrice =  10; // initialize base price
    gradeCounter = 1; // initialize loop counter
    bottles = 1; // initialize bottles
    discount = (basePrice * bottles); // initialize discount
    rate = 0;
    customer = null; // initialize customer name

    // processing phase uses counter-controlled repetition
    while ( gradeCounter <= 3 ) // loop 5 times
    {
        System.out.print( "Enter the name for customer " + gradeCounter + " : " ); // prompt
        customer = input.next(); // input next name
        System.out.print( "Enter the number of bottles for customer " + gradeCounter + " : "); // prompt
        bottles = input.nextInt(); // input next bottles sold
        gradeCounter = gradeCounter + 1; // increment counter by 1
        discount = (basePrice * bottles) - (rate * bottles);

        System.out.printf( "\nThe Price for Customer - %s is : $%.2f\n\n",
            customer, discount );
    } // end while loop

    // calculate purchase based on number of bottles sold

    if ( bottles <= 6 )
    {
        discount = (basePrice * bottles) - (rate * bottles); // calculates discount
    }
    else if 
    ( bottles > 6 && bottles<= 12 )
        {
        discount = (basePrice * bottles) - (rate * bottles); // calculates discount
        }
    else if ( bottles > 48 )
        System.out.println ( "It is forbidden to sell above the maximum range");

} // end method calculatePrice
} // end class PriceCalculator

Answer 1

改变||到&&

if (bottles > 6 || bottles <= 12) // Your code

if (bottles > 6 && bottles <= 12) // changes