4 major parts to focus on

• Input/Output files and string streams (lab 3)
• Data structures (stacks and queues) implementation or carrying out tasks
• Dynamic memory allocation
• constructors
• operator overloading

Fall 2022, Q.8

• operator overloading

vector_2d& operator+=(const vector_2d& rhs){
	x += rhs.x;
	y += rhs.y;
	return *this;
}

Fall 2022, Q.10

• dynamic memory allocation, creating new objects

a) implementing constructor

Vtuber::Vtuber (const string& _name){
	name = _name;
	follower_max = 2;
	follower_num = 0;
	followers = new Followers*[follower_max];
	for (int i = 0; i < followers_max; i++)
		followers[i] = NULL;
}

b) i) implementing insert_follower

void Vtuber::insert_follower(const string& name, int age){
	// increase number of followers right away
	follower_num++;
	// search for an empty spot
	for (int i = 0; i < follower_max; i++){
		// meaning I found an empty spot
		if (followers[i] == NULL){
			// insert a new follower and return
			followers[i] = new Follower(name, age);
			return; // we don't need any if condition in this entire function cuz of this
		}
	}
	// if we didn't return by now, it means we didnt find an empty spot (array full)
	// we need to create a bigger array with double the size
	Follower** new_followers = new Followers*[2*follower_max];
	// copy from the old array into the new array;
	for (int i = 0; i < followers_max*2; i++){
		if (i < follower_max)
			new_followers[i] = followers[i];
		else
			new_follower[i] = NULL;
	}
	// insert the new follower (minus 1 since our array indices start at 0)
	new_follower[follower_num-1] = new Follower(age, name);
	// update follower_max
	follower_max *= 2;
	// get rid of the old followers array
	// i can do this without having to free each follower since i reused the same
	// follower objects in the new followers array (they won't be dangling)
	delete followers; 
}

b) ii) implementing remove_follower

void Vtuber::remove_follower(const string& name){
	for (int i = 0; i < follower_max; i++){
		if (follower[i] = NULL)
			continue;
		if (followers[i].getName() == name){
			delete followers[i];
			followers[i] = NULL;
			
		}
	}
}

c) implementing the destructor ~Vtuber