c++ myvector

template< class T >
class myVector {
private:
	T* start;
	int cur_size;
	int capacity;
	
public:
	typedef T* iterator;
	
	myVector(int size = 0) : cur_size(size), capacity(4) {
		start = new T[capacity + 1];
	};
	
	void push_back(T &t) {
		if (cur_size == capacity) {
			resize();
		}
		start[cur_size] = t;
		cur_size++;
	}
	
	void pop_back() {
		cur_size--;
	}

	T back() {
		return start[cur_size - 1];
	}

	void resize() {
		int new_cap = 2 * capacity;
		T* old_start = start;
		start = new T[new_cap + 1];
		for (int idx = 0; idx < cur_size; idx++) {
			start[idx] = old_start[idx];
		}
		capacity = new_cap;
		delete [] old_start;
	}	

	iterator begin() {
		return start;
	}
	
	iterator end() {
		return &start[cur_size];
	}
	
	int capacity() {
		return capacity;
	}
	
	int size() {
		return cur_size;
	}
}