what is stack memory in c++ - Wikitechy https://www.wikitechy.com/interview-questions/tag/what-is-stack-memory-in-c/ Interview Questions Fri, 19 Aug 2022 10:51:23 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png what is stack memory in c++ - Wikitechy https://www.wikitechy.com/interview-questions/tag/what-is-stack-memory-in-c/ 32 32 What is Stack in C++ ? https://www.wikitechy.com/interview-questions/cpp/what-is-stack-in-c/ https://www.wikitechy.com/interview-questions/cpp/what-is-stack-in-c/#respond Fri, 19 Aug 2022 10:51:23 +0000 https://www.wikitechy.com/interview-questions/?p=4801
  • Stack is an abstract data structure that contains a collection of elements.
  • It implements the Last In First Out (LIFO) mechanism this element is pushed at the end is popped out first.
  • It uses an encapsulated object of either deque or vector or list as its underlying container, providing a specific set of member functions to access its elements.
  • Stack class is a container adapter and container objects hold data of a similar data type.
  • From various sequence containers we can create a stack.
  • By default, deque container will be used, if there is no container is provided.
  • It cannot be used to manipulate, because container adapters don’t support iterators.
  • In stack Type is the Type of element contained and it can be any valid C++ type or even a user-defined type.
  • In stack containeris the Type of underlying container object.
  • Here three types of member types, they are:
    • Value_type- The first template parameter and donates the element types.
    • Container_type- The second template parameter and denotes the underlying container type.
    • Size_type- It is an unsigned integral type.

    • Syntax

    template <class Type, class Container = deque<Type> > class stack;

    Sample Code

    #include <iostream>  
    #include <stack>  
    using namespace std;  
    void newstack(stack <int> ss)  
    {  
        stack <int> sg = ss;  
        while (!sg.empty())  
        {  
            cout << '\t' << sg.top();  
            sg.pop();  
        }  
        cout << '\n';  
    }  
    int main ()  
    {  
        stack <int> newst;  
        newst.push(55);  
        newst.push(44);  
        newst.push(33);  
        newst.push(22);  
        newst.push(11);  
      
        cout << "The stack newst is : ";  
        newstack(newst);  
        cout << "\n newst.size() : " << newst.size();  
        cout << "\n newst.top() : " << newst.top();  
        cout << "\n newst.pop() : ";  
        newst.pop();  
        newstack(newst);   
        return 0;  
    }

    Output

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