C++上机实验报告.doc

上机考试题1定义盒子Box类，要求具有以下成员变量：长、宽、高分别为length，with，high；具有一个静态成员变量：盒子的个数number；具有以下成员函数：1）构造函数和析构函数；2）计算盒子体积的函数；3）计算盒子的表面积的函数；4）显示长、宽、高、体积和表面积的函数；5）显示盒子个数的静态成员函数。编写main函数进行测试。解答：程序编写：#include using namespace std;class Boxprivate:int length,with,high;static int number;public:Box(int L,int W,int H)length = L;with = W;high = H;number+;Box()int getLength()return length;int getWith()return with;int getHigh()return high;static int getNumber()return number;int tiji();int mianji();int Box:tiji()int T = length*with*high;return T;int Box:mianji()int M = 2*(length*with+length*high+with*high);return M;int Box:number = 0;void main()Box b1(2,5,10);Box b2(4,5,10);cout长:b1.getLength()endl;cout宽:b1.getWith()endl;cout高:b1.getHigh()endl;cout体积:b1.tiji()endl;cout表面积:b1.mianji()endl;cout*endl;cout长:b2.getLength()endl;cout宽:b2.getWith()endl;cout高:b2.getHigh()endl;cout体积:b2.tiji()endl;cout表面积:b2.mianji()endl;cout*endl;cout总共:b2.getNumber()个盒子endl;调试结果：上机考试题2定义一个车基类Vehicle，含私有成员speed、weight。派生出自行车类Bicycle，增加high成员；派生出汽车类Car，增加seatnum（座位数）成员。每一个类都有：各自的构造函数、设置（如setSpeed等）和返回每个成员变量（如getSpeed等）的函数、显示名称和参数的函数。编写main函数进行测试。解答：程序编写：#include using namespace std;class Vehicleprivate:int speed,weight;public:Vehicle(int s,int w)speed = s;weight = w;void setSpeed(int s)speed = s;void setWeight(int w)weight = w;int getSpeed()return speed;int getWeight()return weight;void display()cout速度:speedendl;cout重量:weightendl;class Bicycle:public Vehicleprivate:int high;public:Bicycle(int s,int w,int h);void setHigh(int h)high = h;int getHigh()return high;void display2()display();cout高度:highendl;Bicycle:Bicycle(int s,int w,int h):Vehicle(s,w)high = h;class Car:public Vehicleprivate:int seatnum;public:Car(int s,int w,int se);void setSeatnum(int se)seatnum = se;int getSeatnum()return seatnum;void display3()display();cout座位数:seatnumendl;Car:Car(int s,int w,int se):Vehicle(s,w)seatnum = se;void main()Vehicle v1(180,5600);v1.display();v1.setSpeed(200);v1.setWeight(7000);v1.display();cout*endl;Bicycle b1(100,2000,5);b1.display2();b1.setSpeed(120);b1.setWeight(3200);b1.setHigh(8);b1.display2();cout*endl;Car c1(150,4500,12);c1.display3();c1.setSpeed(135);c1.setWeight(8700);c1.setSeatnum(25);c1.display3();调试结果：上机考试题3写一个程序，定义抽象类TDshape，由它派生两个类：Circle（圆形），Square（正方形）。各自需要定义其独有的数据成员和成员函数。用虚函数area（）和printName（）分别计算几种图形的面积和显示图形名称。要求编写以TDshape为接口的函数，借以访问具体类如Circle和Square类的成员函数area（）和printName（）。编写main函数进行测试。解答：程序编写：#include using namespace std;class TDshapepublic:virtual double area() const return 0.0;virtual void printName() const = 0;class Circle:public TDshapeprivate:int radius;public:Circle(int r = 0);void setRadius(int r = 0);int getRadius()return radius;virtual double area() const;virtual void printName() constcoutCircle(圆形):;Circle:Circle(int r)radius = r;double Circle:area() constreturn 3.14159*radius*radius;class Square:public TDshapeprivate:int bian;public:Square(int a = 0);void setRadius(int a = 0);int getBian()return bian;virtual double area() const;virtual void printName() constcoutprintName();coutnarea:area()nn;void vrf(const TDshape &bref)bref.printName();coutnarea:bref.area()nn;int main()Circle c1(2);Square s1(4);TDshape *arrayOfTDshapes2;arrayOfTDshapes0 = &c1;arrayOfTDshapes1 = &s1;cout*通过基类指针访问虚函数*n;for(int i=0;i2;i+)vpf(arrayOfTDshapesi);cout*通过基类引用访问虚函数*n;for(int j=0;j2;j+)vrf(*arrayOfTDshapesj);return 0;调试结果：心得总结 这次上机考试的题目虽然不多，也就仅仅3个，而且还和老师上课讲解的题目有很多相似之处，但是我在做的时候依然会磕磕绊绊，在自认为对的情况下运行程序依旧会有很多的错误，尤其是其中有许多不应该犯的低级错误，这