用C++编写堆栈对象 - 替代语法

#include <iostream>
#include <vector>

template <typename T>
class Stack {
private:
    std::vector<T> stack;

public:
    void push(const T& item) {
        stack.push_back(item);
    }

    T pop() {
        if (stack.empty()) {
            throw std::runtime_error("Stack is empty");
        }

        T item = stack.back();
        stack.pop_back();
        return item;
    }

    bool empty() const {
        return stack.empty();
    }
};

int main() {
    Stack<int> stack;
    stack.push(1);
    stack.push(2);
    stack.push(3);

    while (!stack.empty()) {
        std::cout << stack.pop() << " ";
    }

    return 0;
}