双向队列pop_back函数运用实例

pop_back
语法:

1	void pop_back();

pop_back()删除双向队列尾部的元素。

源代码

/**

* @brief Removes last element.

* This is a typical stack operation. It shrinks the %deque by one.

* Note that no data is returned, and if the last element's data is

* needed, it should be retrieved before pop_back() is called.

void

pop_back()

{

if (this->_M_impl._M_finish._M_cur != this->_M_impl._M_finish._M_first)

{

--this->_M_impl._M_finish._M_cur;

std::_Destroy(this->_M_impl._M_finish._M_cur);

}

else

_M_pop_back_aux();

}

测试代码

测试结果