c++程序设计试题

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1、C++程序设计试题系专业班姓名学号一、写出下列程序的执行结果：(每小题5分，共50分)1、#includeclasssample{inti;doubled;public:voidsetdata(intn){i=n;}voidsetdata(doublex){d=x;}voiddisp(){cout<<”i=”<

2、m.h>double&fn(constdouble&pd){staticdoublead=32;ad+=pd;cout<<”fnbeingcalled…thevalueis:”<classsample{public:sample();sample(int);~sample();v

3、oiddisplay();protected:intx;};sample::sample(){x=0;cout<<”constructingnormally”;}sample::sample(intm){x=m;cout<<”constructingwithanumber:”<

4、sampleobj2(20);obj1.display();obj2.display();}答案：4、#includeclasscomplex{public:complex(double,double);complex(complex&);complex();complexoperator+(complex&);complex&operator=(complex&);voiddisplay();protected:doublereal;doubleimage;};complex::complex(doublex

5、,doubley){real=x,image=y;}complex::complex(complex&x){cout<<”Runingcopyconstructor”real=x.real;image=x.image;}complex::complex(){real=image=0.0;}complexcomplex::operator+(complex&x){returncomplex(real+x.real,image+x.image);}complex&complex::operator=(complex&x){cout<<

6、”Runingassignoperator”;real+=x.real;image+=x.image;return*this;}viodcomplex::display(){cout<templateclasssample{public:sample(){};sa

7、mple(Tx){n=x;}sample&operator+(constsample&);voiddisp(){cout<<”n=”<sample&sample::operator+(constsample&s){staticsampletemp;temp.n=n+s.n;returntemp;}voidmain(){samples1(10),s2(20),s3;s3=s1+s2;s3.disp();}答案：

8、6、#includeclassbase{intn;public:base(inta){cout<<”constructingbaseclasswithanumber=”<