C++编写一个程序设计一个汽车类vehicle，包含的数据成员有车轮个数wheels和车重weight

#include<iostream.h>

class vehicle // 定义汽车类

{

protected:

int wheels// 车轮数

float weight// 重量

public:

vehicle(int wheels,float weight)

int get_wheels()

float get_weight()

float wheel_load()

void show()

}

class car:public vehicle // 定义小车类

{

int passenger_load// 载人数

public:

car(int wheels,float weight,int passengers=4)

int get_passengers()

void show()

}

class truck:public vehicle // 定义卡车类

{

int passenger_load// 载人数

float payload// 载重量

public:

truck(int wheels,float weight,int passengers=2,float max_load=24000.00)

int get_passengers()

float efficiency()

void show()

}

vehicle::vehicle(int wheels,float weight)

{

vehicle::wheels=wheels

vehicle::weight=weight

}

int vehicle::get_wheels()

{

return wheels

}

float vehicle::get_weight()

{

return weight/wheels

}

void vehicle::show()

{

cout <<"车轮:" <<wheels <<"个" <<endl

cout <<"重量:" <<weight <<"公斤" <<endl

}

car::car(int wheels, float weight,

int passengers) :vehicle (wheels, weight)

{

passenger_load=passengers

}

int car::get_passengers ()

{

return passenger_load

}

void car::show()

{

cout <<" 车型:小车" <<endl

vehicle::show()

cout <<"载人:" <<passenger_load <<"人" <<endl

cout <<endl

}

truck:: truck(int wheels, float weight,int passengers, float max_load):vehicle(wheels,weight)

{

passenger_load=passengers

payload=max_load

}

int truck::get_passengers()

{

return passenger_load

}

float truck::efficiency()

{

return payload/(payload+weight)

}

void truck::show()

{

cout <<"车型:卡车" <<endl

vehicle:: show ()

cout <<"载人:" <<passenger_load <<"人" <<endl

cout <<"效率:" <<efficiency() <<endl

cout <<endl

}

void main ()

{

car car1(4,2000,5)

truck tru1(10,8000,3,340000)

cout <<"输出结果" <<endl

car1. show ()

tru1. show ()

}

//汽车类public class vehicle { private int wheels// 车轮个数 private int weight// 车辆重量 public int getWheels() { return wheels} public void setWheels(int wheels) { this.wheels = wheels} public int getWeight() { return weight} public void setWeight(int weight) { this.weight = weight} // 无参构造函数 public vehicle() { } // 带参构造函数 public vehicle(int wheels, int weight) { super()this.wheels = wheelsthis.weight = weight} public void outInfo(){ System.out.println("我是vehicle")System.out.println("我有"+wheels+"个轮子")System.out.println("我的重量是:"+weight+"吨")}}____________________________________________________________________________ //小汽车类public class Car extends vehicle { private int passengers// 载人数 // 无参构造函数 public Car() { super()} // 带参构造函数 public Car(int wheels, int weight, int passengers) { super(wheels, weight)setPassengers(passengers)} public int getPassengers() { return passengers} public void setPassengers(int passengers) { this.passengers = passengers} public void outInfo(){ System.out.println("我是一辆Car")System.out.println("我有"+super.getWheels()+"个轮子")System.out.println("我的重量是:"+super.getWeight()+"吨")System.out.println("我的载人数是:"+passengers+"人")}}______________________________________________________________________ //卡车类public class Truck extends vehicle { private int passengers// 载人数 private int payload// 载重量 // 无参构造函数 public Truck() { super()} // 带参构造函数 public Truck(int wheels, int weight, int passengers, int payload) { super(wheels, weight)setPassengers(passengers)setPayload(payload)} public int getPassengers() { return passengers} public void setPassengers(int passengers) { this.passengers = passengers} public int getPayload() { return payload} public void setPayload(int payload) { this.payload = payload} public void outInfo(){ System.out.println("我是一辆Truck")System.out.println("我有"+super.getWheels()+"个轮子")System.out.println("我的重量是:"+super.getWeight()+"吨")System.out.println("我的载人数是:"+passengers+"人")System.out.println("我的载重量是:"+payload+"吨")}}______________________________________________________________________ //测试类public class Test { public static void main(String[] args) { vehicle v1 = new vehicle(3, 2)vehicle v2 = new Car(4, 3, 4)vehicle v3 = new Truck(6, 6, 3, 12)v1.outInfo()v2.outInfo()v3.outInfo()} }

classVehicle{privateintwheels；privatefloatweight；protectedVehicle(intwheels，floatweight){this。wheels=wheels；this。weight=weight。是普通的除号，即10/2=5。

编写java程序的注意事项：

大小写敏感：Java是大小写敏感的，这就意味着标识符Hello与hello是不同的。

类名：对于所有的类来说，类名的首字母应该大写。如果类名由若干单词组成，那么每个单词的首字母应该大写，例如 MyFirstJavaClass。

方法名：所有的方法名都应该以小写字母开头。如果方法名含有若干单词，则后面的每个单词首字母大写，例如myFirstJavaClass。

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