代码如下:

#include <iostream>
#include <string>using namespace std;//银行工作人员
class BankWorker
{
public:void saveService(){cout << "办理存款业务" << endl;}void payService(){cout << "办理支付业务" << endl;}void transferService(){cout << "办理转账业务" << endl;}
};//中层模块
void doSaveBussiness(BankWorker *worker)
{worker->saveService();
}void doPayBussiness(BankWorker *worker)
{worker->payService();
}void doTransferBussiness(BankWorker *worker)
{worker->transferService();
}void test01()
{BankWorker *worker = new BankWorker;doSaveBussiness(worker);doPayBussiness(worker);doTransferBussiness(worker);
}int main()
{test01();return 0;
}

依赖倒转原则

代码如下:

#include <iostream>
#include <string>using namespace std;class AbstractWorker
{
public:virtual void doBusiness() = 0;
};class SaveBankWorker :public AbstractWorker
{
public:virtual void doBusiness(){cout << "办理存款业务" << endl;}
};class PayBankWorker :public AbstractWorker
{
public:virtual void doBusiness(){cout << "办理支付业务" << endl;}
};class TransferBankWorker :public AbstractWorker
{
public:virtual void doBusiness(){cout << "办理转账业务" << endl;}
};//中层模块
void doNewBusiness(AbstractWorker *worker)
{worker->doBusiness();delete worker;
}void test01()
{doNewBusiness(new TransferBankWorker);doNewBusiness(new PayBankWorker);doNewBusiness(new SaveBankWorker);
}int main()
{test01();return 0;
}

测试结果: