In class operator overloading and template examples.

Dog.hh

#ifndef DOG_HH_
#define DOG_HH_
#include <ostream>

class Dog {
    private:
    int weightLbs;
    int ageYears;

    public:
    Dog();
    Dog(int weightLbs, int ageYears);
    int getAge();
    int getAgeDogYears();
    friend std::ostream& operator<<(std::ostream& stream, const Dog& dog) {
        return stream << "Age: " << dog.ageYears << " Weight: " << dog.weightLbs;
    }
    friend bool operator==(const Dog& dog1, const Dog& dog2) {
        return (dog1.weightLbs == dog2.weightLbs) && (dog1.ageYears == dog2.ageYears);
    }
    friend bool operator!=(const Dog& dog1, const Dog& dog2) {
        return !(dog1 == dog2);
    }
    friend Dog operator+(const Dog& dog1, const Dog& dog2) {
        Dog out;
        out.ageYears = dog1.ageYears + dog2.ageYears;
        out.weightLbs = dog1.weightLbs + dog2.weightLbs;
        return out;
    }
};

Dog::Dog() {
    weightLbs = 0;
    ageYears = 0;
}

Dog::Dog(int weightLbs, int ageYears) {
    this->weightLbs = weightLbs;
    this->ageYears = ageYears;
}

int Dog::getAge() {
    return ageYears;
}

int Dog::getAgeDogYears() {
    return ageYears * 7;
}

#endif

List.cc

#ifndef SCRATCHPAD_HH_
#define SCRATCHPAD_HH_
#include <iostream>

const int MAX_ITEMS = 10;

//unordered list
template <class type>
class List {
    private:
    type data[MAX_ITEMS];
    int totalItems;

    public:
    List();
    bool insert(type dataToAdd);
    void print();
};

template <class type>
List<type>::List() {
    totalItems = 0;
}

template <class type>
bool List<type>::insert(type dataToAdd) {
    if (totalItems >= MAX_ITEMS)
        return false;

    data[totalItems++] = dataToAdd;
    return true;
}

template <class type>
void List<type>::print() {
    for (int i = 0; i < totalItems; i++) {
        std::cout << data[i] << std::endl;
    }
}

#endif

Main.cc

#include <iostream>
#include <string>
#include "Dog.hh"
#include "ScratchPad.hh"
using namespace std;

int main() {
    List<Dog> dogs;

    Dog d(30, 5);
    dogs.insert(d);
    d = Dog(50, 2);
    dogs.insert(d);
    dogs.print();
}