i m trying to implememt a stack with the template.

[meetharry19]

i m trying to implememt a stack with the template.but i m using a user defined data type called (struct) node in class stack.i have declared a pointer of struct node type which is then used in main function.i m facing a problem in accessing this pointer there.pllllllllzzzzzzzzz help me out but giving your valuable suggestions.i have the code below.thnx.

here is the code

#include<iostream.h>
template <class T>
class stack
{
 struct node
 {
  T data;
    node *link;
 }*top;
 
  public:
  stack()
  {
     top=NULL;
  }
 
  //struct node *push(T a);
  //struct node *pop();
 // display();
 // };
 
 
  node *push(T a)
  { struct node* temp;
     if(top==NULL)
     {
      temp=new node;
      top=temp;
      temp->data=a;
      temp->link=NULL;
      }
 
      else
        {
         temp=new node;
         temp->data=a;
         temp->link=top;
         top=temp;
         }
     return top;
    }
 
     node pop()
    { struct node* temp;
      if(top==NULL)
      {
        cout<<"stack is already empty \n " ;
        return top;
 
        }
 
      else
      {
        temp=top;
        top=top->link;
        cout<<"element deleted is\n" <<temp->data;
        delete(temp) ;
        return top;
        }
 
        }
      display ()
      {
         if(top==NULL)
         cout<<"stack is vacant \n" ;
         else
         {
         while(top->link!=NULL)
          {
            cout<<top->data;
            top=top->link;
            }
         }
      }};
 
 
 
 
 
  void main()
     { stack <int> s1;
      int a,d;
      char ch='y';
      while(ch=='y')
      {
        cout<<"1. push the value \n 2. pop the value \n 3.display  elements \n";
        cin>>d;
        switch (d)
        {
         case 1:
         cout<<"push the element\n";
         cin>>a;
         s1.*top=s1.push(a) ;
         break;
 
         case 2:
         cout<<"last element will b deleted \n";
         s1.*top=s1.pop() ;
         break;
 
         case 3:
         cout<<"elements are \n" ;
         s1.display();
         break;
 
         default:cout<<"wrong choice" ;
 
         }
 
        cout<<"do wnt to continue" ;
        cin>>ch;
        if(ch=='y')
        continue;
        else
        break;
 
        }
 
      }

[meetharry19]

help me out plzzzzzzz.

[Ganon11]

1) You waited a total of 2 minutes before posting the last message. It may interest you to know that TSDN is a site in which experts participate from around the globe, on countless schedules - not your own. I, myself, was not even present to be able to answer your question in those 2 minutes. Others are working; others are eating; others aren't even awake! I must ask you to have some more patience with the volunteers who give their time to help out here at TSDN.

2) I'm unclear as to what your trouble is. You say you are facing a problem accessing the pointer - which pointer? What kind of error? Is your code compiling, but not running correctly? Is it giving you a segfault error? A compilation-time error? With a little more detail, the experts here will be infinitely more helpful to you.

[Laharl]

Regardless of pointer errors, void main() is nonstandard. Use int main() instead.

[Meetee]

@OP:

#include<iostream.h> is an old version practice. Use

#include<iostream>
using namespace std;
 

Please post the error message and your problem in detail.

Regards

[meetharry19]

thanks to all for their precious suggestions.
i have solved the problem by my ownself