《面向對象程序設計C 》期末試卷及標準答案(A)

第第頁《面向對象程序設計C++》期末考試試卷（A）標準答案班級：姓名：學號：分數(shù)：1-5．1-5．CDBCC6-10．AADDB11-15．11-15．ABBBC16-20．DCBCC題號四總分得分一、單項選擇題（每小題2分，共40分）二、填空題（前14個空，每空1分，后3個空，每空2分，共20分）1．341．346.8.9.抽象實例2.this指針ED、FA、B、C、D、ED、Fvirtual5.靜態(tài)多態(tài)性動態(tài)多態(tài)性抽象類7.friendvoidfun(A&a)繼承組合或模板在對象被系統(tǒng)釋放之前做一些內(nèi)存清理工作10.11.Aoperator++(int)三、閱讀程序(13分)1、a=89,b=56,c=122、ABC3、A::A()called.B::B()called.B::~B()called.A::~A()called.4、CallB'sfunctionf()CallB'sfunctiong()CallC'sfunctiong()四、編程題(共27分)1、(10分)Complex::Complex(){real=0;imag=0;}Complex::Complex(doubler){real=r;}Complex::Complex(doubler,doublei){real=r;imag=i;}Complexoperator+(Complex&c1,Complex&c2){Complexc;c.real=c1.real+c2.real;c.imag=c1.imag+c2.imag;returnc;}ostream&operator<<(ostream&output,Complex&c){output<<"("<<c.real<<"+"<<c.imag<<"i)"<<endl;returnoutput;}istream&operator>>(istream&input,Complex&c){cout<<"inputrealandimaginarypartofcomplexnumber:";input>>c.real>>c.imag;returninput;}2、(17分)classCircle:publicShape{public:Circle(doubler){radius=r;}voidset(){cout<<"Pleaseinputthevalueofthecircle:"<<endl;cin>>radius;}voidshow(){cout<<"theradiusofthecircle="<<radius<<endl;}doublearea(){return3.14159*radius*radius;}private:doubleradius;};classSquare:publicShape{public:Square(doublea){this->a=a;}voidset(){cout<<"Pleaseinputthevalueofa:"<<endl;cin>>a;}voidshow(){cout<<"a="<<a<<endl;}doublearea(){returna*a;}private:doublea;};intmain(){CircleC(5.5);C.show();SquareS(9.