stackLin

#include<iostream.h>
#include<conio.h>
class StackUsingLink
{private: struct node
  { int data;
     node *link;
  } *top;
 public:
      StackUsingLink();
      void push(int item);
      int  pop();
      int  peak();
      void display();
}x;

StackUsingLink::StackUsingLink() { top=NULL;}

void StackUsingLink::push(int item)
{ node *temp;
  temp=new node;
  if (temp==NULL)
   cout<<"\n Stack is Full\n"<<endl;
  else
    { temp->data = item;
      temp->link = top;
      top=temp;
    }
}

int StackUsingLink::pop()
{int n=-9999;
 if (top == NULL) cout<<"The Stack is Empty\n";
 else
 {n=top->data;
 top=top->link;}
 return n;
}

int StackUsingLink::peak()
{ int n=-9999;
  if (top ==NULL) cout<<"\n The stack is Empty\n";
  else n=top->data;
  return n;
}

void StackUsingLink::display()
{ node *temp;temp=top;
  if (temp !=NULL)
  { cout<< "top ---> ";
    while(temp != NULL)
    {cout.width(5);
    cout<<temp->data;
    temp=temp->link;
    }
   cout<<endl;
  }
  else cout<<"\n The stack is empty...\n"<<endl;
}

void main()
{
 clrscr();
 x.push(8);
 x.push(7);
 x.push(5);
 x.push(2);
 cout<<"\nThe elements of the stack\n";
 x.display();
 int m=x.peak();
 cout<<"\nThe topmost element is"<<m<<endl;
 cout<<"\n After calling peak the stack is\n";
 x.display();
 m=x.pop();
 cout<<"\nAfter deleting a topmost element "<<m<<"  the stack

is..\n";
 x.display();
 getch();
}