Design Pattern 6-prototype Pattern

The prototype mode allows you to dynamically create instances of the current actual type through the base class pointer, and quickly copy the current copy.

 

Prototype. H Content

 1 #ifndef Prototype_H_H 2 #define Prototype_H_H 3  4 #include <iostream> 5 using namespace std; 6  7 class Person 8 { 9 public:10     virtual Person* clone() = 0;11     virtual ~Person() {}12     virtual void display() = 0;13 };14 15 class Teacher : public Person16 {17 public:18     virtual Person* clone() { return new Teacher; }19     virtual void display() { cout << "This is a teacher!" << endl; }20 };21 22 class Worker : public Person23 {24 public:25     virtual Person* clone() { return new Worker; }26     virtual void display() { cout << "This is a worker!" << endl; }27 };28 29 30 void PrototypeTest()31 {32     Person *person1 = new Teacher();33     Person *person2 = new Worker();34 35     person1->clone()->display();36     person2->clone()->display();37 38     delete person1;39     delete person2;40 }41 42 #endif

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Design Pattern 6-prototype Pattern