Get rid of those includes c++

#define MAX_SIZE 100

struct Stack {
    int arr[MAX_SIZE];
    int top;

    Stack() {
        top = -1;
    }

    void push(int value) {
        if (top < MAX_SIZE - 1) {
            top++;
            arr[top] = value;
        }
    }

    void pop() {
        if (top > -1) {
            top--;
        }
    }

    int peek() {
        if (top > -1) {
            return arr[top];
        }
        return -1;
    }

    bool isEmpty() {
        return top == -1;
    }
};

int main() {
    Stack myStack;

    myStack.push(5);
    myStack.push(10);
    myStack.push(15);

    myStack.pop();

    int topElement = myStack.peek();

    bool isEmpty = myStack.isEmpty();

    return 0;
}