36 lines
642 B
C++
36 lines
642 B
C++
/**
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* @name 命令模式
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* @brief: 将请求封装为对象
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* @note 场景：GUI 按钮操作、撤销/重做功能、任务队列
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*/
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class Command {
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public:
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virtual void execute() = 0;
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};
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class Light {
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public:
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void turnOn() {}
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};
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class LightOnCommand : public Command {
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Light* light;
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public:
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void execute() override { light->turnOn(); }
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};
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class RemoteControl {
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Command* command;
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public:
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void setCommand(Command* cmd) { command = cmd; }
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void pressButton() { command->execute(); }
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};
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// 使用
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int main()
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{
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RemoteControl remote;
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remote.setCommand(new LightOnCommand());
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remote.pressButton();
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} |