面向对象程序设计c++试题（含答案）

3、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。小车类car是它的派生类，其中包含载人数passenger_load。每个类都有相关数据的输出方法。在主程序中定义一个car类对象，对其车轮个数、车重、载人数进行设置并显示。(10分) 1、

#include #include class rectangle //(2分) {

private:

int x1,y1,x2,y2; // (2分) public:

rectangle(int xx1,int yy1,int xx2,int yy2) //(1分) {

x1=xx1;y1=yy1;x2=xx2;y2=yy2; }

int getarea() //(2分) {

return abs((x2-x1)*(y1-y2)); } };

void main() {

rectangle rect1(3,7,8,5); (2分)

cout<

2、(10分)

#include class car;（1分） class boat{ private:

int weight; //(1分) public:

boat(int w):weight(w){} //(1分)

friend int totalweight(boat b1,car c1); //(2分) };

class car{ /(1分) private:

int weight; (1分) public:

car(int w):weight(w){};

friend int totalweight(boat b1,car c1); (1分) };

int totalweight(boat b1,car c1) //(1分) {

return b1.weight+c1.weight; }

void main() {

car c1(1000); boat b1(2000);

cout<

3、(10分)

#include

class vehicle // 定义汽车类 (3分) {

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 (3分) {

int passenger_load; // 载人数

public:

car(int wheels,float weight,int passengers=4); int get_passengers(); void show(); };

vehicle::vehicle(int wheels1,float weight1) //(1分) {

wheels=wheels1; weight=weight1; }

int vehicle::get_wheels() {

return wheels; }

float vehicle::get_weight() {

return weight; }

void vehicle::show() (1分) {

cout << \车轮:\个\cout << \重量:\公斤\}

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\vehicle::show();

cout << \载人:\人\cout << endl;

}

void main () {

car car1(4,2000,5); (1分) cout << \输出结果\car1. show (); (1分) }