设计模式《八》——适配器模式
程序员文章站
2022-06-13 12:30:33
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简介
适配器模式将某个类的接口转换成客户端期望的另一个接口表示,目的是消除由于接口不匹配所造成的类的兼容性问题。主要分为三类:类的适配器模式、对象的适配器模式、接口的适配器模式。
角色与职责
实例
#include <iostream>
#include <string>
using namespace std;
class Current18v {
public:
virtual void usrCurrent18v() = 0;
};
class Current220v {
public:
void usrCurrent220v() {
cout << "I'm 220v, Wellcom to use." << endl;
}
};
class Adapter : public Current18v {
public:
Adapter(Current220v* current) {
m_current = current;
}
virtual void usrCurrent18v() {
cout << "Adapter: adaptive 18v to 220V" << endl;
m_current->usrCurrent220v();
}
private:
Current220v* m_current;
};
int main(int argc, char* argv[]) {
Current220v* current220v = new Current220v;
Adapter* adapter = new Adapter(current220v);
adapter->usrCurrent18v(); // we have 220v. but client use 18V
delete current220v;
delete adapter;
cin.get();
return 0;
}