外观模式

C++

#include <iostream>
using namespace std;class stock1
{
public:void Sell(){cout << "股票1卖出" << endl;}void Buy(){cout << "股票1买入" << endl;}
};class stock2
{
public:void Sell(){cout << "股票2卖出" << endl;}void Buy(){cout << "股票2买入" << endl;}
};class stock3
{
public:void Sell(){cout << "股票3卖出" << endl;}void Buy(){cout << "股票3买入" << endl;}
};class NationalDebt1
{
public:void Sell(){cout << "国债1卖出" << endl;}void Buy(){cout << "国债1买入" << endl;}
};class Realty1
{
public:void Sell(){cout << "房地产1卖出" << endl;}void Buy(){cout << "房地产1买入" << endl;}
};class Fund
{
private:stock1* gupiao1;stock2* gupiao2;stock3* gupiao3;NationalDebt1* guozhai;Realty1* fangdichan;public:Fund(){gupiao1 = new stock1();gupiao2 = new stock2();gupiao3 = new stock3();guozhai = new NationalDebt1();fangdichan = new Realty1();}void BuyFund(){gupiao1->Buy();gupiao2->Buy();gupiao3->Buy();guozhai->Buy();fangdichan->Buy();}void SellFund(){gupiao1->Sell();gupiao2->Sell();gupiao3->Sell();guozhai->Sell();fangdichan->Sell();}
};int main()
{Fund *jijin = new Fund();jijin->BuyFund();cout << endl << "Two years later......\n" << endl;jijin->SellFund();return 0;
}

C

#include <stdio.h>
#include <stdlib.h>typedef struct
{void (*Sell)();void (*Buy)();
} Invest;typedef struct
{Invest base;
} Stock;/**********************************************************/
void Stock1_Sell()
{printf("股票1卖出\n");
}void Stock1_Buy()
{printf("股票1买入\n");
}Stock *createStock1()
{Stock *s = (Stock *)malloc(sizeof(Stock));s->base.Sell = Stock1_Sell;s->base.Buy = Stock1_Buy;return s;
}
/**********************************************************/
typedef struct
{Invest base;
} Stock2;void Stock2_Sell()
{printf("股票2卖出\n");
}void Stock2_Buy()
{printf("股票2买入\n");
}Stock2 *createStock2()
{Stock2 *s = (Stock2 *)malloc(sizeof(Stock2));s->base.Sell = Stock2_Sell;s->base.Buy = Stock2_Buy;return s;
}
/**********************************************************/
typedef struct
{Invest base;
} Stock3;void Stock3_Sell()
{printf("股票3卖出\n");
}void Stock3_Buy()
{printf("股票3买入\n");
}Stock3 *createStock3()
{Stock3 *s = (Stock3 *)malloc(sizeof(Stock3));s->base.Sell = Stock3_Sell;s->base.Buy = Stock3_Buy;return s;
}
/**********************************************************/
typedef struct
{Invest base;
} NationalDebt1;void NationalDebt1_Sell()
{printf("国债1卖出\n");
}void NationalDebt1_Buy()
{printf("国债买入\n");
}NationalDebt1 *createNationalDebt1()
{NationalDebt1 *s = (NationalDebt1 *)malloc(sizeof(NationalDebt1));s->base.Sell = NationalDebt1_Sell;s->base.Buy = NationalDebt1_Buy;return s;
}
/**********************************************************/
typedef struct
{Invest base;
} Realty1;void Realty1_Sell()
{printf("房地产卖出\n");
}void Realty1_Buy()
{printf("房地产3买入\n");
}Realty1 *createRealty1()
{Realty1 *s = (Realty1 *)malloc(sizeof(Realty1));s->base.Sell = Realty1_Sell;s->base.Buy = Realty1_Buy;return s;
}
/**********************************************************/
typedef struct
{Stock *gupiao1;Stock2 *gupiao2;Stock3 *gupiao3;NationalDebt1 *guozhai;Realty1 *fangdichan;
} Fund;Fund *createFund()
{Fund *fund = (Fund *)malloc(sizeof(Fund));fund->gupiao1 = createStock1();fund->gupiao2 = createStock2();fund->gupiao3 = createStock3();fund->guozhai = createNationalDebt1();fund->fangdichan = createRealty1();return fund;
}void BuyFund(Fund *fund)
{fund->gupiao1->base.Buy();fund->gupiao2->base.Buy();fund->gupiao3->base.Buy();fund->guozhai->base.Buy();fund->fangdichan->base.Buy();
}void SellFund(Fund *fund)
{fund->gupiao1->base.Sell();fund->gupiao2->base.Sell();fund->gupiao3->base.Sell();fund->guozhai->base.Sell();fund->fangdichan->base.Sell();
}int main()
{Fund *jijin = createFund();BuyFund(jijin);printf("\nTwo years later...\n\n");SellFund(jijin);free(jijin->gupiao1);free(jijin->gupiao2);free(jijin->gupiao3);free(jijin->guozhai);free(jijin->fangdichan);free(jijin);return 0;
}

总结