按照软考中级软件设计师中指定的生成器模式uml图,可编写对应的C++代码:
#include<iostream>
#include<vector>
#include<string>
using namespace std;
/*
创建者模式,又名生成器模式
意图:将一个复杂对象的构建和它的表示分离,使得同样的构建过程可以创建不同的表示
*/
//产品类
class Product{
public:
vector<string> m_partVec;
void add(string part){
m_partVec.push_back(part);
}
void show(){
for(int i = 0; i < m_partVec.size(); i++){
cout<<m_partVec[i]<<endl;
}
}
};
//生成器,纯虚函数,相当于java中的抽象类
class Builder{
public:
virtual ~Builder(){}
virtual void buildPart() const = 0;
};
//具体的生成器,即实现不同的套餐
class Builder1 : public Builder{
private:
Product* m_product = new Product();
public:
~Builder1(){
delete m_product;
}
void buildPart() const override{
m_product->add("partA");
}
Product* getProduct(){
return m_product;
}
};
//具体的生成器,即实现不同的套餐
class Builder2 : public Builder{
private:
Product* m_product = new Product();
public:
~Builder2(){
delete m_product;
}
void buildPart() const override{
m_product->add("partB");
}
Product* getProduct(){
return m_product;
}
};
//主管,负责生成不同的套餐
class Director{
private:
Builder* m_builder;
public:
void setBuilder(Builder* builder){
m_builder = builder;
}
void constrctor(){
m_builder->buildPart();
}
};
int main()
{
Director* director = new Director();
cout<<"套餐A包含:"<<endl;
Builder1* builder1 = new Builder1();
director->setBuilder(builder1);
director->constrctor();
Product* product = builder1->getProduct();
product->show();
delete product;
delete builder1;
cout<<"套餐B包含:"<<endl;
Builder2* builder2 = new Builder2();
director->setBuilder(builder2);
director->constrctor();
product = builder2->getProduct();
product->show();
delete product;
delete builder2;
return 0;
}
执行结果: