command pattern added

Author: cmjagtap

CommandPattern/main.cpp

@@ -0,0 +1,78 @@
+#include <iostream>
+using namespace std;
+
+class RecieverLight {
+public:
+    void TurnLightOn() {
+        cout << "Turning Light on" << endl;
+    }
+    void TurnLightOff()
+    {
+        cout << "Turning Light off" << endl;
+    }
+};
+
+class Command {
+public:
+    virtual ~Command() { }
+    virtual void Excute() = 0;
+};
+
+class TurnOnCommand :public Command {
+public:
+    TurnOnCommand(RecieverLight *rev) {
+        _rev = rev;
+    }
+
+    void Excute() {
+        _rev->TurnLightOn();
+    }
+private:
+    RecieverLight *_rev;
+};
+
+class TurnOffCommand :public Command {
+public:
+    TurnOffCommand(RecieverLight *rev) {
+        _rev = rev;
+    }
+
+    void Excute() {
+        _rev->TurnLightOff();
+    }
+private:
+    RecieverLight *_rev;
+};
+
+class Invoker 
+{
+public:
+    void setCommand(Command* cmd) 
+    {
+        _cmd = cmd;
+    }
+    void Invoke() {
+        _cmd->Excute();
+    }
+
+private:
+    Command *_cmd;
+};
+
+int main() {
+    RecieverLight *rev = new RecieverLight();
+    Command *lightOn = new TurnOnCommand(rev);
+    Command *lightOff = new TurnOffCommand(rev);
+    Invoker *inv = new Invoker();
+    inv->setCommand(lightOn);
+    inv->Invoke();
+    inv->setCommand(lightOff);
+    inv->Invoke();
+
+    delete rev;
+    delete lightOn;
+    delete inv;
+    delete lightOff;
+
+    return 0;
+}