课程设计(小题)

1、1 函数重载定义重载函数max3用于计算三个数的最大值（参数类型分别为int和double）。#include<iostream>using namespace std;int max3(int x, int y, int z)return (x > y ? x : y) > (x > z ? x : z) ? (x > y ? x : y) : (x > z ? x : z);double max3(double x, double y, double z)return (x > y ? x : y) > (x > z ? x :

2、z) ? (x > y ? x : y) : (x > z ? x : z);void main()int a, b, c;cout << "Please input three integer:"cin >> a >> b >> c;cout << "The Max of three is " << max3(a, b, c) << endl;double a1, b1, c1;cout << "Please input three r

3、eal number:"cin >> a1 >> b1 >> c1;cout << "The Max of three is " << max3(a1, b1, c1) << endl;2 类的组合定义point类，数据成员包括x,y，成员函数包括构造函数，拷贝构造函数和析构函数，以及setx，getx，sety，gety四个属性函数。定义line类，端点由两个point类的对象组成，包括构造函数，析构函数以及计算线段长度的函数getlength。在main函数中，定义line的对象，并输出其

4、长度。#include<iostream>#include<cmath>using namespace std;class pointprivate:double x, y;public:point()point(double x, double y) :x(x), y(y)void setx(double xx)x = xx;double getx() return x; void sety(double yy)y = yy;double gety() return y; point(point & p)x = p.x;y = p.y;point();clas

5、s lineprivate:point a, b;public:line(point aa,point bb) :a(aa), b(bb)double getlength()double length;length = sqrt(pow(a.getx() - b.getx(), 2) + pow(a.gety() - b.gety(), 2);return length;line();void main()point p1(2, 3);point p2(5, 6);line l1(p1,p2);cout << "The length of the line is &quo

6、t; << l1.getlength()<<endl;3 对象数组和函数定义student类，数据成员包括姓名name和成绩score，成员函数包括构造函数，拷贝构造函数和析构函数。定义函数void highestscore(student s),输出分数最高的学生姓名和分数。在main函数中定义student sN，调用highestscore函数,输出分数最高的学生姓名和分数。#include<iostream>#include<iomanip>#include<string>const int N = 2;using names

7、pace std;class studentprivate:string name;double score;public:student()student(string n, double s) :name(n), score(s)student(student &s)name = ;score = s.score;/*void setname(string nn)name = nn;string getname() return name; void setscore(double ss)score = ss;double getscore() return score

8、; */void highestscore(student s)int k = 0;double max;max = s0.score;for (int i = 1; i < N; i+)if (max < si.score)max = si.score;k = i;cout << "The name is " << << endl;cout << "Highestscore is " << sk.score << endl;student()friend

9、 ostream & operator <<(ostream & os, student s)os << << " " << s.score << endl;return os;friend istream & operator >>(istream & is, student &s)is >> >> s.score;return is;void main()student sN;for (int i = 0;

10、i < N; i+)cin >> si;sN.highestscore(s);4 静态数据成员设计一个书类，能够保存书名、定价，所有书的本数和总价。（将书名和定价设计为普通数据成员；将书的本数和总价设计为静态数据成员）class bookprivate:double priece;string name;static int num;static double total;int book:num;double book:total;5 动态内存分配定义point类，数据成员包括x,y，

11、成员函数包括构造函数，拷贝构造函数和析构函数，以及setx，getx，sety，gety四个属性函数。在main函数中，用new和delete分配和释放N个point的数组。（N是const常量，N=10）#include<iostream>const int N = 10;using namespace std;class pointprivate:int x, y;public:point()point(int x, int y) :x(x), y(y)point(point & p)x = p.x;y = p.y;void setx(int xx)x = xx;int

12、 getx() return x; void sety(int yy)y = yy;int gety() return y; point();void main()point *p = new pointN;delete p;6 类的继承定义一个point类，包含私有数据成员x，y，成员函数包括无参构造函数，带参构造函数，set和get属性函数。定义circle类，从point类公有派生，增加数据成员半径r，成员函数包括无参构造函数，带参构造函数，计算面积函数getarea。在main函数中定义一个circle的对象，并计算其面积。#include<iostream>using n

13、amespace std;class pointprivate:double x, y;public:point()point(double x, double y) :x(x), y(y)void setx(double xx)x = xx;double getx() return x; void sety(double yy)y = yy;double gety() return y; point();class circle :public pointprivate:double r;public:circle()circle(double x, double y, double r)

14、:point(x, y), r(r)double getarea()return 3.14*r*r;void main()circle c1(2, 3, 4.5);cout << "The area of circle is " << c1.getarea() << endl;7 虚基类定义vehicle类，数据成员包括私有的weight，公有的构造函数，析构函数和输出函数dispaly；从vehicle类公有派生car类，增加数据成员载人数personnum，公有的构造函数,析构函数和输出display；从vehicle类公有派生tru

15、ck类，增加数据成员载货量laod,公有的构造函数，析构函数和输出函数display；从car类和truck类共同公有派生出pickup类，包括公有的构造函数和输出函数。在main函数中，定义pickup类对象，并输出其基本信息。#include<iostream>using namespace std;class vehicleprivate:double weight;public:vehicle(double w) :weight(w)void display()cout << "the weight of vehicle is " <&

16、lt; weight << endl;vehicle();class car :virtual public vehicleprivate:int personnum;public:car(double ww, int p) :vehicle(ww), personnum(p)void display()/vehicle:display();cout << "The number of person is " << personnum << endl;car();class truck :virtual public vehi

17、cleprivate:double load;public:truck(double ww, double l) :vehicle(ww), load(l)void display()/vehicle:display();cout << "The load of the truck is " << load << endl;truck();class pickup :public car, public truckpublic:pickup(double w1, int p, double w2, double l, double w)

18、:car(w1, p), truck(w2, l), vehicle(w)void display()vehicle:display();car:display();truck:display();pickup();void main()pickup p1(211, 2, 200, 170,100);p1.display();8 运算符重载，友元函数和this指针定义一个计数器类counter，具备自增，自减功能（前后缀）；输入输出>>,<<功能。在main函数里测试该类。#include<iostream>using namespace std;class

19、 counterprivate:double num;public:counter()counter(double n) :num(n)counter operator+()+num;return *this;counter operator-()-num;return *this;counter operator+(int)counter nn;nn.num = this->num;num+;return nn;counter operator-(int)counter nn;nn.num = this->num;num-;return nn;friend ostream &am

20、p; operator << (ostream & os, counter c);friend istream & operator >> (istream & is, counter &c);ostream & operator << (ostream & os, counter c)os << c.num << endl;return os;istream & operator >> (istream & is, counter &c)is >

21、;> c.num;return is;void main()counter c1,c2;cin >> c1;c2 = c1.operator+(0);cout << "c1=" << c1;cout << "c2=" << c2;9 虚函数和抽象类定义一个抽象类shape，包括公有的计算面积area函数，计算体积volume函数，输出基本信息函数printinfo（三个函数均为纯虚函数）。从shape公有派生point类，增加私有数据成员x,y坐标，以及构造函数，析构函数。从point公有

22、派生circle类，增加私有数据成员半径r，以及构造函数，析构函数。从circle公有派生cylinder类，增加私有数据成员高度h，以及构造函数，析构函数。（在定义三个派生类的过程中，自己考虑需要重定义哪个虚函数）。在main函数中，定义shape类的指针，指向派生类的对象，输出三类对象的基本信息，面积，体积；（将shape指针改为引用再尝试）。#include<iostream>using namespace std;class shapepublic:virtual double area() = 0;virtual double volume() = 0;virtual v

23、oid printinfo() = 0;class point :public shapeprivate:int x, y;public:point(int x, int y) :x(x), y(y)void printinfo()cout << "x=" << x << ",y=" << y << endl;point();class circle :public pointprivate:double r;public:circle(int x, int y, double r) :poin

24、t(x, y), r(r)double area()return 3.14*r*r;void printinfo()point:printinfo();cout << "r=" << r << endl;/cout << "circle area is " << area() << endl;circle();class cylinder :public circleprivate:double h;public:cylinder(int x, int y, double r, do

25、uble h) :circle(x, y, r), h(h)double area()return circle:area();double volume()return circle:area()*h;void printinfo()circle:printinfo();cout << "h=" << h << endl;/cout << "volume is " << volume() << endl;cylinder();void main()cylinder c1(2, 3,

26、 4, 5);shape *s;s = &c1;(*s).printinfo();cout << "circle area is " << s->area() << endl;cout << "volume is " << (*s).volume() << endl;10 模板设计一个堆栈的类模板Stack，在模板中用类型参数T表示栈中存放的数据，用非类型参数MAXSIZE代表栈的大小。#include<iostream>/const int MAXSIZE

27、 = 5;using namespace std;template<typename T,int MAXSIZE>class stackprivate:T aMAXSIZE;int top;public:stack() :top(0)void push(int x)if (top = MAXSIZE)cout << "the stack is full" << endl;elseatop = x;top+;T pop()if (top = 0)cout << "the stack is empty" <

28、;< endl;elsetop-;return atop;void main()stack<int,5> s;s.push(1);cout << s.pop() << endl;11 文件读写定义学生类数组，有N个人（N=5），包括姓名和语数外三名课的成绩，通过重载<<和>>运算符实现学生数组的文件读写。（姓名用string name;）#include<iostream>#include<fstream>#include<string>#include<iomanip>const int N = 3;using namespace std;class studentprivate:char name10;double Chinese, Math, English;public:student()student(char n, double