Question

我正在设计一个用于打印单个电话电话引脚的程序。该计划应包括 1.客户名称 2.客户的地址 3.电话号码 4.以前的抄表 5.电流表读数。

该计划还将包括消耗的单位数量，并使用以下内容打印账单费用....

如果我消耗的单位为负数，则不会显示任何费用......我该怎么做？

System.out.println（＆＃34;输入当前读数＆＃34;）; CREAD = input.nextInt（）; //获取整数输入并将其存储在当前读数

中

input.close();

int unit= (pread - cread);
System.out.println("Your Consumed unit is " + unit);

if (unit >= 0 && unit <= 100) {
    System.out.println("Your cost is 2.50");

}
else if (unit >= 100 && unit <= 200) {
    System.out.println("Your cost is 2.25");
}
else if (unit >= 200 && unit <=300) {
    System.out.println("Your cost is 1.90");
}
if (unit >= 300) {
    System.out.println("Your cost is 1.65");
}

Answer 1

只需添加另一个输入提示，并将其存储在新变量中。这是改进的代码，代码中的注释中解释了所有更改：

import java.util.Scanner;

public class BillingSystem {

 public static void main(String[] args) {
    // declare variables

    String name,addr;
    int pread, cread,tel; //New variables here

    // input

    Scanner input = new Scanner (System.in);
    System.out.println("Enter The Customer Name");
    name= input.nextLine();

    //Scanner address = new Scanner (System.in); no need for this
    System.out.println("Address of The Customer");
    addr= input.nextLine();

    //Scanner telephone = new Scanner (System.in); no need for this
    System.out.println("Enter telephone number");
    tel=input.nextInt(); //get integer input and store it in tel

    System.out.println("Enter Previous reading");
    pread=input.nextInt(); //get integer input and store it in pread

    System.out.println("Enter Current reading");
    cread=input.nextInt(); //get integer input and store it in cread



 }
}

仪表读数系统

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