Code:

#include<iostream.h>
#include<conio.h>

struct Node { 
int a,b; 
Node *link; 
};

Node *top=NULL,*ptr=NULL;

Node* createNode(int i, int j)
{ 
 ptr = new Node;
 ptr->a=i;
 ptr->b=j;
 ptr->link=NULL;
 return ptr;
}

void push(Node *newptr)
{
  newptr->link=top;
  top=newptr;
}

void pop()
{
 if(top==NULL)
  cout<<"Stack underflow!!";
 else
 {
  ptr=top;
  top=top->link;
  delete ptr;
 }
}

void displayStack()
{
 ptr=top;
 cout<<"\n";
 while(ptr!=NULL)
 {
 cout<<"a="<<ptr->a<<", b="<<ptr->b;
 if(ptr==top)
  cout<<" <-- Stack Top";
 ptr=ptr->link;
 if(ptr==NULL)
  cout<<" <-- Stack bottom";
 cout<<"\n";
 }
 
}

int main()
{

 char ch='y';

 int a, b;


 cout<<"Do you want to add a new node?[y/n]";
 cin>>ch;

 while(ch=='y')
 {
  cout<<"\nEnter a:";
  cin>>a;
  cout<<"\nEnter b:";
  cin>>b;
  
  push(createNode(a, b));

  cout<<"\nDo you want to push another node?[y/n]";
  cin>>ch;
 }

 cout<<"\n\nDisplaying Stack!\n";
 displayStack();

 cout<<"\nDo you want to pop a node?[y/n]";
 cin>>ch;

 while(ch=='y')
 {
  pop();
  cout<<"\nDo you want to pop another node?[y/n]";
  cin>>ch;
 }
 
 cout<<"\n\nDisplaying Stack!\n";
 displayStack();

 cout<<"\nPress any key to exit..";

 getch();
 return 0;
}





Output:


Do you want to add a new record?[y/n]y

Enter a:<any num 1>

Enter b:<any num 2>

Do you want to add another record?[y/n]y

Enter a:<any num 3>

Enter b:<any num 4>

<..add as much nodes as you want..>

Do you want to add another record?[y/n]y

Enter a:<any num m>

Enter b:<any num n>

Do you want to add another record?[y/n]n


Displaying Stack!

a=<num m>, b=<num n> <-- Stack Top
<...no.of records you added in the above format : a=<num p>, b=<num q> .....>
a=<num 3>, b=<num 4>
a=<num 1>, b=<num 2> <-- Stack bottom

Do you want to pop a record?[y/n]y

<..pop as much nodes as you want..>

Do you want to pop another record?[y/n]n


Displaying Stack!

a=<num x>, b=<num y> <-- Stack Top
<...no.of records you added - no.of records  in the above format : a=<num p>, b=<num q> .....>
a=<num 1>, b=<num 2> <-- Stack bottom

Press any key to exit...




**msg me if any you've any problem; esp. output..**