[design mode]<2>. C + + and builder mode (builder pattern)

Original address:

Http://www.cnblogs.com/hebaichuanyeah/p/5585957.html

When building a complex object, detach the build process from the presentation. Causes the same process to create different objects.

For a simple example, building the produce class requires building three parts of the PART1,PART2,PART3. Build them through the build class and return. Through Director
Class calls the build object for configuration.

C + + code

#include <iostream>using namespacestd;classproduce{ Public: Produce () {}Virtual~produce () {}};classbuilder{ Public: Builder () {}Virtual~Builder () {}Virtual voidBuildPart1 () {}Virtual voidBuildPart2 () {}Virtual voidBuildPart3 () {}VirtualProduce *getproduce () {}};classProducebuilder: Publicbuilder{Private:P roduce*Produce; Public: Producebuilder () {}Virtual voidBuildPart1 () {Produce=NewProduce (); cout<<"bulid part1"<<Endl; //Populate the Build part1 section    }    Virtual voidBuildPart2 () {cout<<"bulid part2"<<Endl; //Populate the Build part2 section    }    Virtual voidBuildPart3 () {cout<<"bulid part3"<<Endl; //Populate the Build part3 section    }    VirtualProduce *getproduce () {returnProduce; }};classdirector{Private: Builder*Bulider; Public: Director (Builder*builder) {Bulider=Builder; }    voidconstruct () {Bulider-BuildPart1 (); Bulider-BuildPart2 (); Bulider-BuildPart3 (); }};main () {Produce*Produce; Builder* Bulider =NewProducebuilder (); Director* Mydirector =NewDirector (Bulider); Mydirector-construct (); Produce= bulider->getproduce ();}

[design mode]<2>. C + + and builder mode (builder pattern)