C++中继承使用实例

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一、包含

Gloam类包含Frabjous类

头文件14-1.h

#include <iostream>#include <cstring>using namespace std;                                                                                class Frabjous{private:char fab[20];public: Frabjous(const char *s="c++") // ;fab(s) {}  {strncpy(fab,s,20-1);fab[20]='\0';} virtual void tell() {cout<<fab<<endl;}                                                                                };class Gloam{private: int glip;Frabjous fb;public:Gloam(int g=0,const char*s="C++");Gloam(int g,const Frabjous & f);//Gloam(const Frabjous & f,int g=0);void tell();};

实现文件14-1.c

#include <iostream>#include "14-1.h"using namespace std;                                                                                Gloam ::Gloam(int g,const char *s){ glip=g; fb=s;}Gloam ::Gloam(int g,const Frabjous &f)//Gloam ::Gloam(const Frabjous &f,int g)                                                                                { glip=g; fb=f;}void Gloam::tell(){cout<<"glip:"<<glip;cout<<",fb:";fb.tell();                                                                                }

应用文件14-1appi.c

#include <iostream>using namespace std;#include "14-1.h"int main(){Frabjous A;A.tell();Gloam B;// Gloam C(A,32);Gloam C(32,A);B.tell();C.tell();return 0;}

g++ -o 14-1.exe 14-1.c 14-1appi.c

结果：

[root@localhost C]# ./14-1.exec++glip:0,fb:C++glip:32,fb:c++[root@localhost C]#

二、私有继承

头文件14-2.h

#include <iostream>#include <cstring>using namespace std;                                                                                class Frabjous{ private:char fab[20];public: Frabjous(const char *s="C..") // ;fab(s) {}  {strncpy(fab,s,20-1);fab[20]='\0';} virtual void tell() {cout<<fab<<endl;}                                                                                };class Gloam :private Frabjous{private: int glip;//Frabjous fb;public:Gloam(int g=0,const char*s="C++");Gloam(int g,const Frabjous & f);//Gloam(const Frabjous & f,int g=0);void tell();};

实现文件14-2.c

#include <iostream>#include "14-2.h"using namespace std;                                                                                Gloam ::Gloam(int g,const char *s):Frabjous(s){ glip=g; //fb=s;}Gloam ::Gloam(int g,const Frabjous &f):Frabjous(f){ glip=g;// fb=f;}void Gloam::tell(){cout<<"glip:"<<glip;cout<<",fab:";Frabjous::tell();                                                                                }

应用文件 14-2appi.c

#include <iostream>using namespace std;#include "14-2.h"int main(){Frabjous A;Frabjous A1("wengp");A.tell();A1.tell();Gloam B;// Gloam C(A,32);Gloam C(32,A1);B.tell();C.tell();return 0;}

g++ -o 14-2.exe 14-2.c 14-2appi.c

结果：

[root@localhost C]# ./14-2.exeC..wengpglip:0,fab:C++glip:32,fab:wengp