স্ট্যাক(Stack)

/******************************************************************************

Author: Md. Shahinur Alam
Description: This Program is to demonstrate create, display, push and pop operation in C++

*******************************************************************************/
#include <iostream>
#define MAX_STACK_SIZE 50

using namespace std;

int ourstack[MAX_STACK_SIZE],top=0;

// This function is to push in stack
int pushinstack(int item) 
{
    if(top>MAX_STACK_SIZE-1)
    {
        cout<<"\nStack is full";
    }
    else
    {
        ourstack[top]=item;
        top++;
    }
}

// This function is to display all values in stack
int displaystack() 
{
    if(top>0)
    {
        cout<<"\nValues in stack: ";
        for(int i=0;i<top;i++)
        {
            cout<<ourstack[i]<<" ";
        }
    }
    else
    cout<<"\nThere is no value in stack";
}

// This function is to pop from stack
void popfromstack() 
{
    if(top<0)
    {
        cout<<"\nStack is Empty";
    }
    else
    {
        cout<<"\npopped : "<<ourstack[top-1];
        top--;
    }
}

int main()
{
    
    displaystack();
    
    pushinstack(5);
    pushinstack(10);
    pushinstack(15);
    pushinstack(20);
    
    displaystack();
    
    popfromstack();
    
    displaystack();
    
    return 0;
}