实验八 继承与派生类.docx

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1、实验八继承与派生类1．实验目的要求（1）掌握单继承程序设计的基本方法。（2）掌握多继承程序设计的基本方法。2．实验内容(1)下面程序定义一个vehicle类，并派生出car和truck两个派生类。#includeclassvehicle{protected:intwheels;doubleweight;public:voidinitialize(intwhls,doublewght);intget_wheels(){returnwheels;}doubleget_weight(){returnweight;}doublewheel_loading(){ret

2、urnweight/wheels;}};classcar:publicvehicle{private:intpassenger_load;public:voidinitialize(intwhls,doublewght,intpeople=4);intpassengers(){returnpassenger_load;}};classtruck:publicvehicle{private:intpassenger_load;doublepayload;public:voidinit_truck(intnumber=2,doublemax_load=24000.0);doubleef

3、ficiency();intpassengers(){returnpassenger_load;}};voidvehicle::initialize(intwhls,doublewght){wheels=whls;weight=wght;}voidcar::initialize(intwhls,doublewght,intpeople){wheels=whls;weight=wght;passenger_load=people;}voidtruck::init_truck(intnumber,doublemax_load){passenger_load=number;payload

4、=max_load;}doubletruck::efficiency(){returnpayload/(payload+weight);}voidmain(){vehiclebicycle;bicycle.initialize(2,25);cout<<"thebicyclehas"<

5、()<<"poundspertire.";caraudi;audi.initialize(4,3500.0,5);cout<<"theaudihas"<

6、k(2,33675.0);cout<<"thejiefhas"<

7、privatevehicle和classtruck:privatevehicle程序运行结果有无变化，为什么？l修改后，有变化，继生类无法调用vehicle类的成员对象[分析与思考]l定义并实现vehicle类、car类和truck类的构造函数，完成vehicle类、car类和truck类的数据成员初始化工作。。#includeclassvehicle{protected:intwheels;doubleweight;public:vehicl