c++实验答案.doc

1.声明一个Circle类，有1)数据成员Radius(半径)2)成员函数GetValue()用来给半径赋值3)成员函数GetArea()计算圆的面积在主函数中创建一个Circle类的对象进行测试，显示出面积。#includeusing namespace std;class circle private: int radius; public: void getvalue() coutradius; double getarea() return 3.14*radius*radius; void output() cout半径是：radius,面积是：getarea(); ;int main() circle circle1; double radius; circle1.getvalue(); circle1.getarea(); circle1.output();输入半径：2半径是：2，面积是：12.562.声明一个tree类，有1)数据成员ages（树龄）2)成员函数grow(int years)对ages加上years3)成员函数age()显示对象的数据成员ages的值4)构造函数tree(int n=0)进行初始化在主函数中创建一个tree类的对象进行测试（创建一个树龄为18的对象，调用age()显示树龄，之后调用grow（4），生长4年，再显示树龄）。2:#includeusing namespace std;class treepublic:tree(int a)ages=a;void grow(int years);void age();private:int ages;void tree:grow(int years)coutyears;ages+=years;void tree:age()cout该树年龄为：agesendl;int main()tree t1(5);t1.age();t1.grow(4);t1.age();system(pause);return 0;该树年龄为：5请输入年份：5该树年龄为：103. 声明一个名为Rectangle的矩形类，其属性为矩形的左下角和右上角两点的坐标，并有成员函数计算矩形的周长及面积。编程实现求左下角与右上角坐标分别为（2.1，3.2），（5.2，6.3）的矩形周长及面积。#include#includeclass Rectangleprivate: double left; double bottom; double right; double top;public: void SetPoint(double l,double b,double r,double t) left=l; bottom=b; right=r; top=t; void cal(double left,double bottom,double right,double top) double s; s=abs(left-right)*abs(bottom-top); cout该长方形的面积为：sendl; void zhou(double left,double bottom,double right,double top) double z; z=2*(abs(left-right)+abs(bottom-top); cout该长方形的周长为：zendl; void Getp1(double left,double bottom) cout长方形的左下角坐标是：left,bottomendl; void Getp2(double right,double top) cout长方形的右上角坐标是：right,topendl; ;void main() Rectangle r1; double l,b,r,t; coutlb; coutrt; r1.Getp1(l,b); r1.Getp2(r,t); r1.cal(l,b,r,t); r1.zhou(l,b,r,t);请输入长方形的左下角的坐标：2.1 3.2请输入长方形的右上角的坐标：5.2 6.3长方形的左下角的坐标：2.1 3.2长方形的右上角的坐标：5.2 6.31. 编写一个简单复数类Scomplex，要求用友元函数重载“+”、“-”运算符，用成员函数重载“=”运算符，使之能够实现整数或浮点数和复数的加法和减法，并且进行测试。1.#include using namespace std;class Scomplexprivate:double real;double image;public:Scomplex( double x = 0, double y = 0 );friend Scomplex operator+( int a, Scomplex b );friend Scomplex operator-( int a, Scomplex b );friend Scomplex operator+( double a, Scomplex b );friend Scomplex operator-( double a, Scomplex b );Scomplex &operator=( const Scomplex &b );void print();Scomplex:Scomplex( double x, double y )real = x;image = y;Scomplex operator+( int a, const Scomplex b )Scomplex temp;temp.real = a + b.real;temp.image = b.image;return temp;Scomplex operator+( double a, const Scomplex b )Scomplex temp;temp.real = a + b.real;temp.image = b.image;return temp;Scomplex operator-( double a, const Scomplex b )Scomplex temp;temp.real = a - b.real;temp.image = -b.image;return temp;Scomplex operator-( int a, const Scomplex b )Scomplex temp;temp.real = a - b.real;temp.image = -b.image;return temp;Scomplex &Scomplex:operator=( const Scomplex &b )if( this = &b )return *this;real = b.real;image = b.image;return *this;void Scomplex:print()cout = 0 )cout +;cout image i endl;int main()Scomplex t1(1, 2), t2(3, 4), t3;t3 = 1 + t2;t3.print();t3 = 2 - t2;t3.print();t3 = t1;t3.print();return 0; 4+4i-1-4i1+2i2. 空间一点p的坐标为（x,y,z）,其中x,y,z为整数。编写点类Point3D,定义空间两点之间的加”+”,减”-”运算为相应三个坐标值分别进行加、减运算，要求实现空间两点之间的加”+”减”-”赋值”=”运算，空间两点间的比较”= =”运算。要求编写Point3D类的声明定义和测试程序。#include using namespace std;class Point3Dprivate:int x, y, z;public:Point3D( int a = 0, int b = 0, int c = 0 );Point3D operator+( Point3D b );Point3D operator-( Point3D b );Point3D &operator=( const Point3D &b );bool operator=( Point3D b );void print();Point3D:Point3D( int a, int b, int c )x = a;y = b;z = c;Point3D Point3D:operator+( Point3D b )Point3D temp;temp.x = x + b.x;temp.y = y + b.y;temp.z = z + b.z;return temp;Point3D Point3D:operator-( Point3D b )Point3D temp;temp.x = x - b.x;temp.y = y - b.y;temp.z = z - b.z;return temp;Point3D &Point3D:operator=( const Point3D &b )if( this = &b )return *this;x = b.x;y = b.y;z = b.z;return *this;bool Point3D:operator=( Point3D b )int t1, t2, t3;t1 = x - b.x;t2 = y - b.y;t3 = z - b.z;if( t1 = 0 & t2 = 0 & t3 = 0 )return true;elsereturn false;void Point3D:print()cout ( x , y , z ) endl; int main()Point3D p1(1, 1, 1), p2(2, 2, 2), p3;p3 = p2 + p1;p3.print();p3 = p2 - p1;p3.print();p3 = p1;p3.print();if( p1 = p2 )cout p1 = p2 endl;elsecout p1 != p2 endl;return 0;（3，3，3）（1，1，1）（1，1，1）p1!=p23. 设计一个时间类Time，包括时、分、秒等私有数据成员。重载“+”和“-”运算符以实现时间的加法和减法运算，并进行测试。 #include using namespace std;class Timeprivate:int hour, minute, second;public:Time(int a = 0, int b = 0, int c = 0);Time operator+(Time x);Time operator-(Time x);void print();Time() ;Time:Time(int a, int b, int c)hour = a;minute = b;second = c;Time Time:operator+(Time x)Time temp;temp.second = second + x.second;temp.minute = minute + x.minute;temp.hour = hour + x.hour;if(temp.second 59)temp.minute += 1;temp.second -= 60;if(temp.minute 59)temp.hour += 1;temp.minute -= 60;if(temp.hour 23)temp.hour -= 24;return temp;Time Time:operator-(Time x)Time temp;temp.second = second - x.second;temp.minute = minute - x.minute;temp.hour = hour - x.hour;if(temp.second 0)temp.minute -= 1;temp.second += 60;if(temp.minute 0)temp.hour -= 1;temp.minute += 60;if(temp.hour 0)temp.hour += 24;return temp;void Time:print()couthour:minute:secondabcdef;Time A1(a, b, c), A2(d, e, f), A3, A4;A3 = A1 + A2;A3.print();A4 = A1 - A2;A4.print();return 0;1 20 92 10 13:30:1023:10:81. 设计一个单基继承的类层次程序，利用Person类派生出Student类，增加属性xh（学号），Person类中至少有姓名、年龄等数据成员，成员函数中构造函数对其初始化，析构函数释放相应存储单元，输出函数输出其数据成员的值，其它成员函数根据需要添加，在主函数中进行测试。#include#includeusing namespace std;class Personprotected:string name;int age;string address;public:Person(string nam,int a,string add)name=nam;age=a;address=add;void display()coutname:nameendl;coutage:ageendl;coutaddress:addressendl;class Student:public Personprivate:int num;public:Student(string nam,int a,string add,int xh):Person(nam,a,add)num=xh;void display_1()display();coutnum:numendl;int main()Student stud(li_hua,18,Nan_yang,1001);stud.display_1();return 0;name:li_huaage:18address:Nan_yangnum:10012. 先定义“高度“类和”圆“类C ircle, 再由Height类和Circle类多重派生出“圆柱体”类Cylinder。在主函数中定义一个圆柱体对象，调用成员函数求出圆柱体的体积和表面积。#includeusing namespace std;class Circleprotected:double R,s1;public:Circle(float r)R=r;void display()s1= 3.14*R*R;1. 分别定义Teacher(教师)类和Cadre（干部）类，采用多重继承方式由这两个类派生出新类Teacher_ Cadre（教师兼干部）。要求：1) 在两个基类中都包含姓名、年龄、性别、地址、电话等数据成员.2) 在Teacher类中还包含数据成员title（职称），在Cadre类中还包含数据成员post（职务），在Teacher_ Cadre类中还包含数据成员wages(工资)。3) 对两个基类中得姓名、年龄、性别、地址、电话等数据成员用相同的名字，在引用这些数据成员时，指定作用域。4) 在类体中声明成员函数，在类外定义成员函数。5) 在派生类Teacher_ Cadre的成员函数show中调用Teacher类中的display函数，输出姓名、年龄、性别、职称、电话，然后再用cout语句输出职务和工资。#includeusing namespace std;class Teacher/教师protected: char name20; int age; char sex2; char add20; char tel20; char title20;/职称public:void getdata();void display();class Cadre/干部protected: char name20; int age; char sex2; char add20; char tel20; char post20;/职务public: void getdata(); void disp();class Teacher_Cadre :public Teacher,public Cadre/教师兼干部private: int wages;/工资public:void show();void getdata();void disp();void Teacher:getdata() coutplease input data:endl; coutname;coutendl; coutage;coutendl;coutsex;coutendl;coutadd;coutendl;couttel;coutendl;couttitle;coutendl;void Teacher:display() coutoutput teacher data:endl; cout姓名：nameendl; cout年龄：ageendl; cout性别：sexendl; cout地址：addendl; cout电话：telendl; cout职称：titleendl;void Cadre:getdata() coutplease input Cadre data:endl; coutname;coutendl; coutage;coutendl;coutsex;coutendl;coutadd;coutendl;couttel;coutendl;coutpost;coutendl;void Cadre:disp() coutoutput Cadre data:endl; cout姓名：nameendl; cout年龄：ageendl; cout性别：sexendl; cout地址：addendl; cout电话：telendl; cout职务：postendl;void Teacher_Cadre:show() display(); void Teacher_Cadre:getdata() coutplease input Teacher_Cadre data:endl; Teacher:getdata(); coutpost; coutwages;void Teacher_Cadre:disp() cout职务:postendl;cout工资:wagesendl; int main() Teacher t; Cadre c; Teacher_Cadre s; t.getdata(); c.getdata(); s.getdata(); t.display(); c.disp(); s.show(); s.disp(); system(pause); return 0;2. 设计一个虚基类Person，包含姓名和年龄私有数据成员以及相关的成员函数；由它派生出领导类Leader，包含职务和部门私有数据成员以及相关的成员函数；再由Person派生出工程师类Engineer，包含职务和专业私有数据成员以及相关的成员函数；再由Leader和Engineer类派生出主任工程师类Chairman。并采用相关数据进行测试。#includeusing namespace std;class personprivate: char name10; int age; public: person() void getdata() cout输入数据：endl; coutname; coutage; void dispdata() cout输出数据：endl; cout姓名：nameendl; cout年龄：ageendl; ; class Leader:virtual public person/领导类 private: char post10; /职务 char depart10;/部门 public: Leader() void getdata() person:getdata(); coutpost; coutdepart; void dispdata() person:dispdata(); cout职务：postendl; cout部门：departendl; ;class Engineer:virtual public person/工程师类 private: char post10; char major10;public: Engineer() void getdata() person:getdata(); coutpost; coutmajor; void dispdata() person:dispdata(); cout职务：postendl; cout专业：majorendl; ;class Chairman:public Leader,public Engineer/主任工程师类 public: Chairman()coutconstrcuter!endl;int main() Leader l; Engineer e; l.getdata(); e.getdata(); Chairman t; l.dispdata(); e.dispdata(); system(pause); return 0; 1、声明抽象基类Shape，由它派生出3个派生类：Cirle（圆形）、Rectangle（矩形）、Triangle（三角形），用一个函数printArea分别输出以上三者的面积，3个图形的数据在定义对象是给定。#include#includeusing namespace std;const double PI=3.14;class Shape/抽象基类 public: Shape() virtual void getradius(double r=0); virtual void printArea()=0;protected: int a; int b; int c; double radius; ;void Shape:getradius(double r) radius=r; class Circle:public Shape/圆形类 public: Circle(double r)radius=r; void printArea();protected: double radius; double s;void Circle:printArea() s=PI*radius*radius; cout圆的面积为:sendl;class Rectangle:public Shape/矩形类 public: Rectangle(int i=0,int j=0); void printArea();protected: int a; int b; int s;Rectangle:Rectangle(int i,int j) a=i; b=j; void Rectangle:printArea() s=a*b; cout矩形的面积为:sendl;class Triangle:public Shape/三角形类 public: Triangle(int i,int j,int k) a=i; b=j; c=k; void printArea();protected: int a; int b; int c; double s; double s1; void Triangle:printArea() s=(a+b+c)/2; s1=sqrt(s*(s-a)*(s-b)*(s-c); cout三角形的面积为:s1endl; int main() Circle c(5); Rectangle r(4,6); Triangle t(5,12,13); c.printArea(); r.printArea