在函数模板中创建一个包含迭代器

#include<iostream>
#include<iterator>

template<typename T>
class MyContainer {
public:
    MyContainer(T* data, size_t size) : data_(data), size_(size) {}

    class iterator : public std::iterator<std::input_iterator_tag, T> {
    public:
        iterator(T* ptr) : ptr_(ptr) {}

        iterator& operator++() {
            ++ptr_;
            return *this;
        }

        bool operator==(const iterator& other) const {
            return ptr_ == other.ptr_;
        }

        bool operator!=(const iterator& other) const {
            return ptr_ != other.ptr_;
        }

        T& operator*() {
            return *ptr_;
        }

    private:
        T* ptr_;
    };

    iterator begin() {
        return iterator(data_);
    }

    iterator end() {
        return iterator(data_ + size_);
    }

private:
    T* data_;
    size_t size_;
};

int main() {
    int data[] = {1, 2, 3, 4, 5};
    MyContainer<int> container(data, 5);

    for (auto it = container.begin(); it != container.end(); ++it) {
        std::cout << *it << " ";
    }

    return 0;
}