c++——多态、继承、运算符重载综合例子代码

一时失言乱红尘 2022-07-12 03:25 187阅读 0赞

#include <iostream>
    #include <string.h>
    using namespace std;
    class A
    {
    private:
        char *name;
    public:
        A(char *n);
        virtual ~A();
    };
    A::~A()
    {
        int m;
        if(name != NULL)
        {
            m = strlen(name)+1;
            delete[] name;
            name = NULL;
            cout<<"A类释放了"<<m<<"字节空间"<<endl;
        }
    }
    A::A(char *n)
    {
        name = new char[strlen(n)+1];
        strcpy(name,n);
        cout<<"A类申请了"<<strlen(n)+1<<"字节空间"<<endl;
    }
    
    class B:public A
    {
    private:
        char *address;
    public:
        B(char *n,char *add);
        virtual ~B();
    };
    B::B(char *n,char *add):A(n)
    {
        address = new char[strlen(add)+1];
        strcpy(address,add);
        cout<<"B类申请了"<<strlen(add)+1<<"字节空间"<<endl;
    }
    B::~B()
    {
        int m;
        if(address != NULL)
        {
            m = strlen(address)+1;
            delete[] address;
            address = NULL;
            cout<<"B类释放了"<<m<<"字节空间"<<endl;
        }
    }
    int main()
    {
        //A a("x12345678");
        //  A *pa = new A("x12345678");
        // delete pa;
    
        A *pb = new B("xy12345678","吉首大学");
        delete pb;
    
        return 0;
    }

动物类模拟：

#include <iostream>
    #include <string.h>
    using namespace std;
    class CAnimal
    {
    private:
        int age;
        float weight;
    public:
        CAnimal() {};
        CAnimal(const CAnimal &ca);
        CAnimal& operator = (const CAnimal &ca);
        CAnimal(int a,float w);
        void Run();
        void Shout();
        void Grow();
    };
    
    CAnimal::CAnimal(int a,float w)
    {
        age = a;
        weight = w;
        // cout<<"信息："<<a<<","<<w<<endl;
    }
    
    CAnimal::CAnimal(const CAnimal &ca)
    {
        this->age = ca.age;
        this->weight = ca.weight;
    }
    
    void CAnimal::Run()
    {
        cout << " is running!" << endl;
    }
    
    void CAnimal::Shout()
    {
        cout << " is shouting!" << endl;
    }
    
    void CAnimal::Grow()
    {
        cout << " is growing!" << endl;
    }
    
    
    class Chorse:public CAnimal
    {
    private:
        char name[16];
        char kind[16];
    public:
        Chorse() {};
        Chorse(const Chorse &ca):CAnimal(ca)
        {
            strcpy(name,ca.name);
            strcpy(kind,ca.kind);
    
        };
        Chorse(char* n,char* k,int a,float w);
        void Run()
        {
            cout << name;
            CAnimal::Run();
        };
        void Shout()
        {
            cout << name;
            CAnimal::Shout();
        };
        void Grow()
        {
            cout << name;
            CAnimal::Grow();
        };
    };
    Chorse::Chorse(char* n,char* k,int a,float w):CAnimal(a,w)
    {
        strcpy(name,n);
        strcpy(kind,k);
    }
    class Ccat:public CAnimal
    {
        private:
        char name[16];
        char kind[16];
    public:
        Ccat() {};
        Ccat(char* n,char* k,int a,float w);
        Ccat(const Ccat &ca):CAnimal(ca)
        {
            strcpy(name,ca.name);
            strcpy(kind,ca.kind);
        };
        void Run()
        {
            cout << name;
            CAnimal::Run();
        };
        void Shout()
        {
            cout << name;
            CAnimal::Shout();
        };
        void Grow()
        {
            cout << name;
            CAnimal::Grow();
        };
    };
    
    Ccat::Ccat(char* n,char* k,int a,float w):CAnimal(a,w)
    {
        strcpy(name,n);
        strcpy(kind,k);
    }
    
    class Cdog:public CAnimal
    {
       private:
        char name[16];
        char kind[16];
    public:
        Cdog() {};
        Cdog(char* n,char* k,int a,float w);
        Cdog(const Cdog &ca):CAnimal(ca)
        {
            strcpy(name,ca.name);
            strcpy(kind,ca.kind);
        };
        void Run()
        {
            cout << name;
            CAnimal::Run();
        };
        void Shout()
        {
            cout << name;
            CAnimal::Shout();
        };
        void Grow()
        {
            cout << name;
            CAnimal::Grow();
        };
    };
    Cdog::Cdog(char* n,char* k,int a,float w):CAnimal(a,w)
    {
        strcpy(name,n);
        strcpy(kind,k);
    }
    int main()
    {
        Cdog c("DogWangcai","alaska",10,11.5);
        c.Run();
        c.Grow();
        c.Shout();
    
        Ccat * cat = new Ccat("CatJerry","jiamao",10,56.3);
        /*
            cat->Run();
            cat->Grow();
            cat->Shout();
        */
        Ccat * cat2 = cat;
        //Ccat cat2(*cat);
        cat2->Run();
        cat2->Grow();
        cat2->Shout();
        cat2->CAnimal::Shout();
    
        CAnimal * a = new CAnimal(30,56);
        //a->Ccat::Run();
    
        return 0;
    }