c++面向对象程序设计—考试题大全.docVIP

测试一个名为rectangle的矩形类，其属性为矩形的左下角与右上角两个点的坐标，能计算矩形的面积。(10分) 定义一boat与car两个类，二者都有weight属性，定义二者的一个友元函数totalweight()，计算二者的重量和。(10分) 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。#include iostream.h #include math.h 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) coutrect1.getarea()endl; (1分) } 2、(10分) #include iostream.h 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); couttotalweight(b1,c1)endl;(1分) } 3、(10分) #includeiostream.h 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: 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; } void main () { ca