标签:
下面是一个给定的基类Animal声明和main()性能。
class Animal { public: virtual void cry() { cout<<"不知哪种动物,让我怎样学叫?"<<endl; } }; int main( ){ Animal *p; p = new Animal(); p->cry(); Mouse m1("Jerry",'m'); p=&m1; p->cry(); Mouse m2("Jemmy",'f'); p=&m2; p->cry(); Cat c1("Tom"); p=&c1; p->cry(); Dog d1("Droopy"); p=&d1; p->cry(); Giraffe g1("Gill",'m'); p=&g1; p->cry(); return 0; }
/* * Copyright (c) 2015,烟台大学计算机学院 * All right reserved. * 作者:邵帅 * 文件:Demo.cpp * 完毕时间:2015年06月07日 * 版本:v1.0 */ #include <iostream> using namespace std; class Animal { public: virtual void cry() { cout<<"不知哪种动物。让我怎样学叫?"<<endl; } }; class Mouse:public Animal { public: Mouse(string n,char s):name(n),sex(s){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"老鼠。我的叫声是:吱吱吱!"<<endl; } private: string name; char sex; }; class Cat:public Animal { public: Cat(string n):name(n){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅猫,我的叫声是:喵喵喵!
"<<endl; } private: string name; }; class Dog:public Animal { public: Dog(string n):name(n){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅狗,我的叫声是:汪汪汪。"<<endl; } private: string name; }; class Giraffe:public Animal { public: Giraffe(string n,char s):name(n),sex(s){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"长颈鹿,我的脖子太长,可是发不出来声。"<<endl; } private: string name; char sex; }; int main( ){ Animal *p; p = new Animal(); p->cry(); Mouse m1("Jerry",'m'); p=&m1; p->cry(); Mouse m2("Jemmy",'f'); p=&m2; p->cry(); Cat c1("Tom"); p=&c1; p->cry(); Dog d1("Droopy"); p=&d1; p->cry(); Giraffe g1("Gill",'m'); p=&g1; p->cry(); return 0; }
/* * Copyright (c) 2015,烟台大学计算机学院 * All right reserved. * 作者:邵帅 * 文件:Demo.cpp * 完毕时间:2015年06月07日 * 版本:v1.0 */ #include <iostream> #include <string> using namespace std; class Animal { public: virtual void cry()=0; }; class Mouse:public Animal { public: Mouse(string n,char s):name(n),sex(s){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"老鼠。我的叫声是:吱吱吱!"<<endl; } private: string name; char sex; }; class Cat:public Animal { public: Cat(string n):name(n){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅猫,我的叫声是:喵喵喵!"<<endl; } private: string name; }; class Dog:public Animal { public: Dog(string n):name(n){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅狗,我的叫声是:汪汪汪!
"<<endl; } private: string name; }; class Giraffe:public Animal { public: Giraffe(string n,char s):name(n),sex(s){} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"长颈鹿。我的脖子太长,可是发不出来声。"<<endl; } private: string name; char sex; }; int main( ){ Animal *p; //p = new Animal(); //p->cry(); Mouse m1("Jerry",'m'); p=&m1; p->cry(); Mouse m2("Jemmy",'f'); p=&m2; p->cry(); Cat c1("Tom"); p=&c1; p->cry(); Dog d1("Droopy"); p=&d1; p->cry(); Giraffe g1("Gill",'m'); p=&g1; p->cry(); return 0; }
改造上面的程序,将“名字”成员作为抽象类Animal数据成员被各派生类使用。
/* * Copyright (c) 2015,烟台大学计算机学院 * All right reserved. * 作者:邵帅 * 文件:Demo.cpp * 完毕时间:2015年06月07日 * 版本:v1.0 */ #include <iostream> #include <string> using namespace std; class Animal { public: Animal(string n):name(n){} virtual void cry()=0; protected: string name; }; class Mouse:public Animal { public: Mouse(string n,char s):Animal(n),sex(s) {} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"老鼠,我的叫声是:吱吱吱!
"<<endl; } private: char sex; }; class Cat:public Animal { public: Cat(string n):Animal(n) {} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅猫,我的叫声是:喵喵喵!
"<<endl; } }; class Dog:public Animal { public: Dog(string n):Animal(n) {} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅狗,我的叫声是:汪汪汪!
"<<endl; } }; class Giraffe:public Animal { public: Giraffe(string n,char s):Animal(n),sex(s) {} virtual void cry() { cout<<"我叫"<<name<<",是一仅仅"<<((sex=='f')?"女":"男")<<"长颈鹿,我的脖子太长,可是发不出来声!"<<endl; } private: char sex; }; int main( ) { Animal *p; //p = new Animal(); //p->cry(); Mouse m1("Jerry",'m'); p=&m1; p->cry(); Mouse m2("Jemmy",'f'); p=&m2; p->cry(); Cat c1("Tom"); p=&c1; p->cry(); Dog d1("Droopy"); p=&d1; p->cry(); Giraffe g1("Gill",'m'); p=&g1; p->cry(); return 0; }
@ Mayuko
版权声明:本文博主原创文章,博客,未经同意不得转载。
标签:
原文地址:http://www.cnblogs.com/bhlsheji/p/4821027.html