Java入门第二季6-1，答答租车系统

• 文件图

  • 共有的抽象类Common

package 租车系统;

public abstract class Common {
    public int num;             //汽车序号
    public String name;     //汽车名字
    public int zaiKe;           //载客量
    public int zaiHuo;          //载货量
    public int money;           //一天租金

    public void display(){
        //输出单辆汽车价目表
        System.out.print(num+".      "+name+"   "+money+"元/天   ");
        if(money<1000)
            System.out.print("  ");
        if(zaiKe>0){
            System.out.print("载人："+zaiKe+"人");
        }
        if(zaiHuo>0){
            if(zaiKe>0){
                System.out.print("，");
            }
            System.out.print("载货："+zaiHuo+"吨");
        }
        System.out.println();
    }
}

• 汽车1

package 租车系统;

public class Car1 extends Common {
    Car1(){
        num = 1;
        name = "奥迪A4  ";
        money = 500;
        zaiKe = 4;
        zaiHuo = 0;
    }
}

• 汽车2

package 租车系统;

public class Car2 extends Common {
    Car2(){
        num = 2;
        name = "马自达6 ";
        money = 400;
        zaiKe = 4;
        zaiHuo = 0;
    }
}

• 汽车3

package 租车系统;

public class Car3 extends Common {
    Car3(){
        num = 3;
        name = "皮卡雪6 ";
        money = 450;
        zaiKe = 4;
        zaiHuo = 2;
    }
}

• 汽车4

package 租车系统;

public class Car4 extends Common {
    Car4(){
        num = 4;
        name = "金龙        ";
        money = 800;
        zaiKe = 20;
        zaiHuo = 0;
    }
}

• 汽车5

package 租车系统;

public class Car5 extends Common {
    Car5(){
        num = 5;
        name = "松花江    ";
        money = 400;
        zaiKe = 0;
        zaiHuo = 4;
    }
}

• 汽车6

package 租车系统;

public class Car6 extends Common {
    Car6(){
        num = 6;
        name = "依维柯    ";
        money = 1000;
        zaiKe = 0;
        zaiHuo = 20;
    }
}

• Main函数

package 租车系统;
import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Common c1 = new Car1();
        Common c2 = new Car2();
        Common c3 = new Car3();
        Common c4 = new Car4();
        Common c5 = new Car5();
        Common c6 = new Car6();
        System.out.println("欢迎使用答答租车系统：");
        System.out.println("您是否要租车：1是 0否");
        Scanner input = new Scanner(System.in);
        int i = input.nextInt();
        if(i == 0){
            System.exit(-1);        //输入0退出程序
        }
        System.out.println("您可租车的类型及其价目表：");
        System.out.println("序号 汽车名称   租金            容量");
        c1.display();
        c2.display();
        c3.display();
        c4.display();
        c5.display();
        c6.display();
        System.out.println("请输入您要租汽车的数量：");
        int j = input.nextInt();            //j为租汽车的数量
        if(j<=0){
            System.out.println("数字不能小于等于0");
            System.exit(-1);
        }
        String[] m = new String [j];    //m为可载人的车
        String[] n = new String[j]; //n为可载货的车
        int sumRen = 0;                     //sumRen保存总载客量
        int sumHuo = 0;                     //sumHuo保存总载货量
        int sumMoney = 0;                   //sumMoney保存总价格
        int num;                                    //num为选择的车辆序号
        for(i=0;i<j;i++){
            System.out.println("请输入第"+(i+1)+"辆车的序号");
             num = input.nextInt();
            switch(num){
            //计算车型，载客量，载货量，总价格
                case 1:{
                    m[i] = c1.name;
                    sumRen += c1.zaiKe;
                    sumHuo += c1.zaiHuo;
                    sumMoney += c1.money;
                    break;
                }
                case 2:{
                    m[i] = c2.name;
                    sumRen += c2.zaiKe;
                    sumHuo += c2.zaiHuo;
                    sumMoney += c2.money;
                    break;
                }
                case 3:{
                    m[i] = c3.name;
                    n[i] = c3.name;
                    sumRen += c3.zaiKe;
                    sumHuo += c3.zaiHuo;
                    sumMoney += c3.money;
                    break;
                }
                case 4:{
                    m[i] = c4.name;
                    sumRen += c4.zaiKe;
                    sumHuo += c4.zaiHuo;
                    sumMoney += c4.money;
                    break;
                }
                case 5:{
                    n[i] = c5.name;
                    sumRen += c5.zaiKe;
                    sumHuo += c5.zaiHuo;
                    sumMoney += c5.money;
                    break;
                }
                case 6:{
                    n[i] = c6.name;
                    sumRen += c6.zaiKe;
                    sumHuo += c6.zaiHuo;
                    sumMoney += c6.money;
                    break;
                }
            }
        }
        System.out.println("请输入租车天数");
        int day = input.nextInt();
        sumMoney *= day;
        System.out.println("您的账单：");
        System.out.println("可载人的车有：");
        for(i=0;i<j;i++){
            //输出可载人的车
            if(m[i]!=null)
                System.out.print(m[i]+"    ");
        }
        System.out.println("共载人："+sumRen+"人");
        System.out.println("可载货的车有：");
        for(i=0;i<j;i++){
            //输出可载货的车
            if(n[i]!=null)
                System.out.print(n[i]+"    ");
        }
        System.out.println("共载货："+sumHuo+"吨");
        System.out.println("租车的总价格："+sumMoney+"元");
    }
}

• 程序运行效果