System.out.println("正在为您打印车票,并找您"+b+"元");为什么输出的数字是相反数

Question

import java.util.Scanner;

public class station {

private int staStation;

private int endStation;

private int price;

private int money;

private int number;

public void station(){}

    public void shuru_station(){

    Scanner scanner = new Scanner(System.in);

    System.out.println("请输入起始站");

    staStation=scanner.nextInt();

    System.out.println("请输入终点站");

    endStation=scanner.nextInt();

    System.out.println("请输入您要购买车票的数量");

    number=scanner.nextInt();

    }

    public void price(){

    int changdu=endStation-staStation;

    if(changdu<=5){

    price=3;

    }

    else if(changdu<=8){

    price=4;

    }

    else{

    price=5;

    }

    }

    public void shuru_price(){

        Scanner scanner = new Scanner(System.in);

        System.out.println("您需要支付"+price*number+"元");

        System.out.println("请支付");

        money=scanner.nextInt();

    }

    public void compare(){

    int money1=price*number;

    int i=0;

   

    for(;i<=3;i++){

    int a=3-i;

    int b=money-money1;

    Scanner scanner = new Scanner(System.in);

        System.out.println("您需要支付"+price*number+"元");

        System.out.println("请支付");

        money=scanner.nextInt();

        if(money<money1){

        System.out.println("您支付的金额不足，请重新支付");

        System.out.println("您还有"+a+"次机会支付");

        }

        else if(money==money1){

        System.out.println("正在为您打印车票");

        break;

        }

        else {

        System.out.println("正在为您打印车票,并找您"+b+"元");

        break;

         

        }

    }

    }

public static void main(String[] args) {

station s=new station();

s.shuru_station();

s.price();

s.compare();

}

}

Answer 1

代码写的很难懂。java里面命名统一是驼峰式，不提倡下划线和中英结合，并且循环那块知识你很薄弱。为什么为负，你算b的时候money还没输入。写的太复杂，自己看了一脸懵逼。不过作为初学者需要鼓励。加油。