java - 如何在Java中使用For循环询问用户输入

Question

这是我的作业:

编写一个模拟收银机的程序。提示用户输入三件商品的价格。将它们加在一起即可得到小计。确定小计的税费 (6%)。求销售小计加税的总金额。显示每件商品的价格、小计金额、税额和最终金额。

我是这样完成的:

package cashregisteremulator;

import java.util.Scanner;

public class CashRegisterEmulator {

  public static void main(String[] args) {

    Scanner price = new Scanner(System.in);


    System.out.print("Please enter a price for item number one $");
    double price1 = price.nextDouble();

    System.out.print("Please enter a price for item number two $" );
    double price2 = price.nextDouble();

    System.out.print("Please enter a price for item number three $");
    double price3 = price.nextDouble();

    double total = ((price1) + (price2) + (price3));
    System.out.println("The subtotal is $" + total);

    double tax = .06;

    double totalnotax = (total * tax );
    System.out.println("The tax for the subtotal is $" + totalnotax);
    double totalplustax = (total + totalnotax);
    System.out.println("The total for your bill with tax is $" + totalplustax);

  }
}

但是，我需要使用循环来完成此分配。由于提示只要求 3 次迭代，所以我想到使用 for 循环。到目前为止我有这个:

package CashRegister;

import java.util.Scanner;

 public class CashRegister {

public static void main(String[] args) {
    Scanner askPrice = new Scanner(System.in);  

   for(double i = 0 ; i < 3; i++);  
 {
   System.out.println("Enter a value") ;
   double price = askPrice.nextDouble();



 }
}    
}

我需要做什么才能向用户询问三次价格？

Answer 1

我不会为您编写所有代码，但这可以使用 for 循环轻松实现:

int numberOfIterations = 3;

// The format of the for loop:
// for (initialize counter; continuation condition; incrementer)
for(int i = 0; i < numberOfIterations; i++){
    // do something
}