栈（stack）在计算机科学中是限定仅在表尾进行插入或删除操作的线性表。栈是一种数据结构，它按照后进先出的原则存储数据，先进入的数据被压入栈底，最后的数据在栈顶，需要读数据的时候从栈顶开始弹出数据。栈是只能在某一端插入和删除的特殊线性表。用桶堆积物品，先堆进来的压在底下，随后一件一件往上堆。(Stack (stack) in computer science is limited only in the footer for insertion or deletion operation of linear table.Stack is a data structure that data is stored according to the principle of last in, first out, first to enter the data by the bottom of the stack, the final data at the top of the stack, need to read data from the stack begin to pop up the data.The stack is only at one end special linear table insertion and deletion.An item barrels, heap in under the pressure in the first, then a a pile up.)