达达租车系统（脑袋没点思路，借鉴慕友代码做的）

//抽象类
public abstract class car {

private String name;//类型
private int manned;//载客量
private int cargo;//载货量                 
private int price;//价格
public String getName(){
    return name;
}
public void setName(String name){
    this.name=name;
}
public int getManned(){
    return manned;
}
public void setManned(int manned){
    this.manned=manned;
}
public int getCargo(){
    return cargo; 
}
public void setCargo(int cargo){
    this.cargo=cargo;
}
public int getPrice(){
    return price;
}
public void setPrice(int price){
    this.price=price;
}
public abstract void getic();

}

//货车类
public class carhc extends car {

@Override
public void getic() {
    // TODO Auto-generated method stub
    System.out.println(getName()+"\t"+getPrice()+"元/天"+"\t"+getCargo()+"吨"+"\t");
}

public carhc(String carName,int carCargo,int carPrice){
this.setName(carName);
this.setCargo(carCargo);
this.setPrice(carPrice);
}

}

//客车类
public class carkc extends car {

@Override
public void getic() {
    // TODO Auto-generated method stub
    System.out.println(getName()+"\t"+getPrice()+"元/天"+"\t"+getManned()+"人"+"\t");
}
public carkc(String carName,int carManned,int carPrice){
    this.setName(carName);
    this.setManned(carManned);
    this.setPrice(carPrice);
}    

}

皮卡车类
public class carpk extends car {

@Override
public void getic() {
    // TODO Auto-generated method stub
    System.out.println(getName()+"\t"+getPrice()+"元/天"+"\t"+getManned()+"人"+"\t"+getCargo()+"吨"+"\t");
}
public carpk(String carName,int carManned,int carCargo,int carPrice){
    this.setName(carName);
    this.setManned(carManned);
    this.setCargo(carCargo);
    this.setPrice(carPrice);
}

}

import java.util.Scanner;
public class test {

public static void main(String[] args) {
    // TODO Auto-generated method stub
car[] cars={
        new carhc("东风天锦",20,1200),
        new carhc("松花江",6,600),
        new carkc("奥迪A8",4,800),
        new carkc("E7团体",23,900),
        new carpk("丰田皮卡",4,1,400),
        new carpk("长城皮卡",4,3,600)
};
System.out.println("欢迎使用哒哒租车系统\n您是否租车:1是     0否");
Scanner input=new Scanner(System.in);
if(input.nextInt()==1){
    System.out.println("您可租车的类型及其价目表:");
    System.out.println("序号"+"\t"+"汽车名称"+"\t"+"租金"+"\t"+"载人/载货");
    for(int i=0;i<cars.length;i++){
        System.out.print(i+"\t");
        cars[i].getic();
    }
    System.out.println("请选择租车数量");
    int score =input.nextInt();
    car[] cars2=new car[score];
    int[] days=new int[score];
    int sum=0;
    int rs=0;
    int t=0;
    for(int i=0;i<score;i++){
        System.out.println("请输入第"+(i+1)+"辆车序号");
        cars2[i]=cars[input.nextInt()];
        System.out.println("请输入租借天数");
        days[i]=input.nextInt();
    }
    System.out.println("------清单------");
    System.out.println("可载人的车有:");
    for(int i=0;i<score;i++){
        if(cars2[i].getManned()>0){
            System.out.print(cars2[i].getName()+"/"+days[i]+"天     ");
        }
        rs+=cars2[i].getManned();           
    }
    System.out.println("共载人:"+rs+"人");
    System.out.println("可载货的车有");
    for(int i=0;i<score;i++){
        if(cars2[i].getCargo()>0){
            System.out.print(cars2[i].getName()+"/"+days[i]+"天     ");
        }
        t+=cars2[i].getCargo();
        sum+=cars2[i].getPrice()*days[i];
    }
    System.out.println("共载货:"+t+"吨");
    System.out.println("总价格:"+sum);
}else{
    System.exit(0);
}

}

}