polytest.cpp

Code

/*
    polytest.cpp
    CIS 250
    Dave Klick
    2009-04-13

    Class used to demonstrate inheritance,
    polymorphism, and virtual functions.
*/

#include <ctime>
#include <iostream>
#include <cstdlib>
#include <string>
using std::cout;
using std::endl;
using std::string;

class Name {
private:
    string name;
public:
    Name() : name("") { }
    Name(const char* str) : name(str) { }
    const string getName() const { return name; }
    void setName(const char* nm) { name = nm; }
};

class Animal {
public:
    Name name;
    Animal() : name("") {}
    Animal(const char* s) : name(s) {}
    virtual void speak() const = 0;
    virtual void print() const = 0;
    virtual void setSpeech(const char*) = 0;
    const string getName() const { return name.getName(); }
    void setName(const char* nm) { name.setName(nm); }
};

class Dog : public Animal {
    string speech;
public:
    Dog() : Animal("Fido"), speech("Woof") {}
    Dog(const char* nm) : Animal(nm), speech("Woof") {}
    void setSpeech(const char* s) { speech = s; }
    const string getSpeech() { return speech; }
    void print() const {
        cout << "Dog named " << name.getName()
            << " says " << speech;
    }
    void speak() const { cout << speech << endl; }
};

class Cat : public Animal {
    string speech;
public:
    Cat() : Animal("Tiger"), speech("Meow") {}
    Cat(const char* nm) : Animal(nm), speech("Meow") {}
    void setSpeech(const char* s) { speech = s; }
    const string getSpeech() { return speech; }
    void print() const {
        cout << "The cat (" << name.getName()
            << ") says " << speech;
    }
    void speak() const { cout << speech << endl; }
};

int main(void) {
    srand(time(NULL));
    int i;
    char* names[] = { "Freddie", "Bobbie", "Killer",
        "Sammy", "Champs", "Blue", "Rambo", "Kitty",
        "Clyde", "Annie", "Kelly", "Kitty", "Trouble",
        "Krissy" };
    char* sayings[] = { "Arf", "Hi", "Purr", "Wassup" };
    Animal* pets[20];

    for (i=0; i<20; i++) {
        int type = rand() % 2;
        int r = rand() % 14;
        if (type == 0) {
            pets[i] = new Cat(names[r]);
        } else {
            pets[i] = new Dog(names[r]);
        }
    }

    for (i=0; i<20; i++) {
        int n = rand() % 3;
        if (n == 0) {
            int x = rand() % 4;
            pets[i]->setSpeech(sayings[x]);
        }
    }

    for (i=0; i<20; i++) {
        pets[i]->print();
        cout << endl;
    }
    for (i=0; i<20; i++) pets[i]->speak();
    system("pause");
    return 0;
}