C语言程序设计实验报告10.docx

1、C语言程序设计实验报告10C+语言程序设计实验报告基础题一实验任务：定义一个哺乳动物Mammal类，再由此派生出狗Dog类，二者都定义 Speak()成员函数，基类中定义为虚函数，定义一个Dog类的对象，调用Speak函数，观察运行结果。代码：#includeusing namespace std;class Animalpublic:virtual void Speak(); ;void Animal:Speak()coutAnimal中的SPEAK()函数被调用;class Dog:virtual public Animalpublic:virtual void Speak(); ;voi

2、d Dog:Speak()coutDog中的SPEAK()函数被调用endl;void main()Dog Dog1;Dog1.Speak();结果：基础题二实验任务：对Point类重载+（自增）、-（自减）运算符代码：#includeusing namespace std;class Pointpublic:Point(int x=0,int y=0)this-x=x;this-y=y;void show();Point& operator+();Point operator+(int);Point& operator-();Point operator-(int);private:int

3、x,y; ;void Point:show()cout该点坐标为(x,y)endl;Point& Point:operator+()x+;y+;return *this;Point Point:operator+(int)Point old=*this;+(*this);return old;Point& Point:operator-()x-;y-;return *this;Point Point:operator-(int)Point old=*this;-(*this);return old;int main()Point myPoint(1,3);cout第一次输出 ;myPoint.

4、show();coutShow myPoint+: ;(myPoint+).show();coutShow +myPoint: ;(+myPoint).show();coutShow myPoint-: ;(myPoint-).show();coutShow -myPoint: ;(-myPoint).show();return 0;结果：提高题一实验任务：设计一个字符串类MyString，具有构造函数、析构函数、拷贝构造函数，重载运算符+，尽可能地完善它，使之能满足各种需要。代码：#include #include class person public: person(char *pn);

5、 person(person &p); person(); private: char *pname; ; person:person(char *pn) cout构造函数: pnendl; pname=new charstrlen(pn)+1; if(pname!=0) strcpy(pname,pn); person:person(person &p) cout拷贝 p.pname 到新的堆空间n; pname=new charstrlen(p.pname)+1; if(pname!=0) strcpy(pname,p.pname); person:person() cout析构函数: p

6、nameendl; pname0=0; delete pname; void main() person p1(jack); person p2(p1); 结果：提高题二实验任务：声明一个Shape抽象类，再此基础上派生出Rectangle和Circle类，二者都有GetArea()函数计算对象的面积，GetPerim()函数计算对象的周长。代码：#includeusing namespace std;#define n 3.14class Shapepublic:virtual void GetArea()=0;virtual void GetPerim()=0;class Rectangl

7、e:public Shapepublic:Rectangle(int a,int b)this-a=a;this-b=b;void GetArea();void GetPerim();private:int a,b;void Rectangle:GetArea()cout矩形面积为a*bendl; void Rectangle:GetPerim()cout矩形周长为a)+(2*this-b)c=c;void GetArea();void GetPerim();private:int c;void Circle:GetArea()cout圆形面积为c*c*nendl; void Circle:G

8、etPerim()cout圆形周长为c)GetArea();void fun1(Shape *ptr)ptr-GetPerim();void main()Rectangle obj(3,4);Circle obj1(2); fun(&obj);fun1(&obj);fun(&obj1);fun1(&obj1);结果：选做题一实验任务：编写一个程序，计算正方体、球体和圆柱体的表面积和体积。（要求：抽象出一个公共基类作为虚基类，运用虚函数的知识设计程序）代码：#includeusing namespace std;#define n 3.14class Shujupublic:virtual vo

9、id biaomianji()=0;virtual void tiji()=0;class zhengfangti:public Shujupublic:zhengfangti(int a)this-a=a;void biaomianji();void tiji();private:int a ;void zhengfangti:biaomianji()cout正方形的表面积为6*a*aendl;void zhengfangti:tiji()cout正方形的体积为a*a*ab=b;void biaomianji();void tiji();private:int b ;void qiuti:b

10、iaomianji()cout球体的表面积为4*n*b*bendl;void qiuti:tiji()cout球体的体积为(4.0/3.0)*n*b*b*br=r;this-d=d;void biaomianji();void tiji();private:int r,d;void yuanzhuti:biaomianji()cout圆柱体的表面积为2*n*r*r+2*n*r*dendl;void yuanzhuti:tiji()cout圆柱体的体积为n*r*r*dbiaomianji();void fun1(Shuju *ptr)ptr-tiji();void main()zhengfang

11、ti zheng(2);qiuti qiu(3);yuanzhuti yuanzhu(4,5);fun(&zheng);fun1(&zheng);fun(&qiu);fun1(&qiu);fun(&yuanzhu);fun1(&yuanzhu);结果：选做题二实验任务：编写一个分数类fraction ，其分子、分母为整数，通过重载运算符+、-、*、/ ，实现该类数据之间的四则运算，要求计算结果为最简分数，如(7/3)*(9/14)=(3/2)4*(7/8)=(7/2)代码：#include using namespace std;class fractionpublic:fraction(in

12、t n=1,int d=1)num=n;den=d;divideZero();fraction:divideZero()if (0 = den)cout 输入非法,分母为零! endl;return true;return false; fraction& operator=(const fraction& other)num=other.num;den=other.den;return *this;fraction operator+(const fraction& other)fraction res;res.num=num*other.den+den*other.num;res.den=

13、den*other.den;return res;fraction operator-(const fraction& other)fraction res;res.num=num*other.den-den*other.num;res.den=den*other.den;return res;fraction operator*(const fraction& other)return fraction(num*other.num,den*other.den);fraction operator/(const fraction& other)return fraction(num*other.den,den*other.num);void display()coutnum/denendl;private:int num,den;void main()fraction a(2,5);fraction b(a);fraction c;b=fraction(3,7);c=a+b;c.display();c=a-b;c.display();c=a*b;c.display();c=a/b;c.display();结果：