The MDI of Windows programming

Create all kinds of guns.

Design Focus:

1 base class as interface

2 Inheriting classes are a variety of different classes

3 Build the factory class, then create different classes as needed, you can pass in keywords, or indexes, and so on.

#pragma once#include <string> #include <iostream>using namespace Std;//base classclass gun{public:virtual String description () {return "Generic Gun";}};/ /derived Classclass machinegun:p ublic gun{public:string description () {return "Machinegun-gun for fast Shoot";}}; Class Lasergun:public Gun{public:string description () {return "Lasergun-melt everything with Heat";}}; Class Shockwavegun:p ublic gun{public:string description () {return "Shockwavegun-shock down Everything";}}; Class Goffactory_gun{public:goffactory_gun () {}gun *creategun (const string &type) {if ("machinegun" = = Type) {return (New machinegun);} else if ("lasergun" = = Type) {return (new Lasergun);} else if ("shockwavegun" = = Type) {return (new Shockwavegun);} Else{return NULL;}}; void Goffactory_gun_run () {Goffactory_gun gofgun; Gun *g = Gofgun.creategun ("machinegun"); Cout<<g->description () <<endl;delete g;g = GofGun.createGun (" Lasergun "); Cout<<g->description () <<endl;delete g;g = gofgun.cReategun ("Shockwavegun"); Cout<<g->description () <<endl;delete g;} 

Results: