c++ stl stack_C ++ STL中的stack :: size（）函数-蒲公英云

c++ stl stack_C ++ STL中的stack :: size（）函数

c++ stl stack

Prototype:

原型：

stack<T> st; //declaration
    int st.size();

Parameter:

参数：

No parameter passed

Return type: int

返回类型： int

Header file to be included:

包含的头文件：

#include <iostream>
    #include <stack>
    OR
    #include <bits/stdc++.h>

Usage:

用法：

The function returns the current size of the stack.

该函数返回堆栈的当前大小。

Time complexity: O(1)

时间复杂度：O(1)

Example:

例：

For a stack of integer,
    stack<int> st;
    st.push(4);
    st.push(5);
    stack content:
    5 
 C++ implementation: 
 Output 
 ...use of size function...
stack size is: 3
stack elements are:
top element is:6
top element is:5
top element is:4
stack empty
stack size is: 0
3 pop operation performed total to make stack empty
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