Problem
Factory is a design pattern in common usage. Please implement a
ToyFactorywhich can generate proper toy based on the given type.Example
ToyFactory tf = ToyFactory(); Toy toy = tf.getToy('Dog'); toy.talk(); >> Wow toy = tf.getToy('Cat'); toy.talk(); >> Meow
Solution
/**
* Your object will be instantiated and called as such:
* ToyFactory* tf = new ToyFactory();
* Toy* toy = tf->getToy(type);
* toy->talk();
*/
class Toy {
public:
virtual void talk() const=0;
};
class Dog: public Toy {
void talk() const {
cout << "Wow" << endl;
}
};
class Cat: public Toy {
void talk() const {
cout << "Meow" << endl;
}
};
class ToyFactory {
private:
const string kCat = "Cat";
const string kDog = "Dog";
public:
/**
* @param type a string
* @return Get object of the type
*/
Toy* getToy(string& type) {
if (type == kCat) {
return new Cat();
} else if (type == kDog) {
return new Dog();
}
return NULL;
}
};
