c++面向对象程序设计试题和答案(经典题目)

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;

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}

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()

——第10页——

{

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) }

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