程序设计与算法语言---C++程序设计基础习题答案 习题8

一、选择题

1-5 CDBBC

6-10 DBBAA

11-12 AC 注意：第11小题可以不做，教材未讲虚基类的内容

13 BC

14-16 ADC

注明第14小题：C++中运算符“.”,“::”,“sizeof()”，“?:”，“.*”不能重载

二、程序填空题

1. int sum() x=a y=b num num1(i,j) num1.sum()

2. base::fun()

3. x[i]+a.x[i] t x[i]+a.x[i] (*this)

4.virtual *pa pa=&p

三、分析程序输出结果

1. constructing A!

constructing A!

destructing A!

destructing A!

2. c1:1

第1次调用拷贝构造函数！

c2:1

第2次调用拷贝构造函数！

c3:2

第3次调用拷贝构造函数！

c4:15

3. 2

2

1

4. ABC

5. base::display1()

derived::display2()

四、编写程序

1.

#include

class square

{

private:

float radius;

public:

square(float d=0)

{radius=d;}

float perimeter()

{return 4*radius;}

};

void main()

{ square p(4);

cout<<"正方形p的周长是"<

2.

#include

class building

{

private:

float length,broadth;

int story;

public:

building(float a,float b,int c)

{length=a;broadth=b;story=c;}

float area()

{return length*broadth*story;}

};

void main()

{ building p(30,40,10);

cout<

}

3.

#include

class cube

{

private:

float x;

public:

cube(float d=0)

{x=d;}

float area()

{return 6*x*x;}

float v()

{return x*x*x;}

};

void main()

{ float a;

cin>>a;

cube p(a);

cout<<"体积为"<

cout<<"表面积为"<

}

4.

#include

class point

{

private:

float x,y,z;

public:

point(float a,float b,float c)

{x=a;y=b;z=c;}

point()

{ }

void print()

{cout<<'('<

{ point B;

B.x=x+A.x;

B.y=y+A.y;

B.z=z+A.z;

return B;

}

friend void operator ++(point &A)

{ A.x=A.x+1;

A.y=A.y+1;

A.z=A.z+1;

}

};

void main()

{ point A(1,2,3),B(2,6,10),C;

C=A+B;

C.print();

++A;

A.print();

}

5.

#include

class Person

{

protected:

char name[20];

int age;

public:

void input()

{ cout<<"姓名：";

cin>>name;

cout<<"年龄：";

cin>>age;

}

void disp()

{ cout<

cout<

}

};

class Student:private Person {

private:

char cla[20];

int num;

public:

void input()

{ Person::input();

cout<<"班级:";

cin>>cla;

cout<<"学号：";

cin>>num;

}

void disp()

{ Person::disp();

cout<

cout<

}

};

class Teacher:private Person