How do i rectify the following errors in c++ because i am not able to look and rectif

[danushnick]

The following errors are shown:
1)50:identifier 'push' cannot have a type qualifier.
2)147: declaration missing;
3)147: compound statement missing ;
4)147: compound statement missing ;

#include<iostream.h>
#include<conio.h>
class stack
{
private:
struct node
{
int data;
node *next;
}*p;
public:
stack();
void create(int numtot);
int push();
int pop();
void display();
~stack();
};
stack::stack()
{
p=NULL;
}
void stack::create(int numtot)
{
node *temp,*rtr;
rtr=new node;
rtr=p;
int num,i;
for(i=0;i<numtot;i++)
{
if(p==NULL)
{
temp=new node;
temp->data=num;
temp->next=NULL;
p=temp;
}
else
{
while(rtr->next!=NULL)
{
rtr=rtr->next;
}
temp=new node;
temp->data=num;
rtr->next=temp;
temp->next=NULL;
}
int stack::push()
{
int num;
cin>>num;
s.create(num);
s.display();
return 0;
}
int stack::pop()
{
node *temp,*rtr;
int item;
rtr=new node;
rtr=p;
if(rtr==NULL)
cout<<"Stack is full";
return NULL;
else
{
while(rtr!=NULL)
{
rtr=rtr->next;
}
temp=new node;
temp=rtr;
item=temp->data;
rtr=rtr->next;
delete temp;
return item;
}
}
void stack::display()
{
int *rtr;
rtr=new node;
rtr=p;
if(rtr==NULL)
cout<<"Stack is empty";
else
{
while(rtr->next!=NULL)
{
cout<<"The elements are"<<rtr->data<<"/n";
rtr=rtr->next;
}
}
}
stack::~stack()
{
node *temp;
temp=new node;
while(p->next!=null)
{
temp=p;
p=p->next;
delete temp;
}
}
int main()
{
stack s;
int numtot,ch,a;
do
{
cout<<"Stack using link list"<<"/n";
cout<<"_____________________"<<"/n";
cout<<"1.Create"<<"/n";
cout<<"2.Push"<<"/n";
cout<<"3.Pop"<<"/n";
cout<<"4.Display"<<"/n";
cout<<"5.Exit"<<"/n";
cout<<"Enter your choice:"
cin>>ch;
switch(ch)
{
case 1:
cout<<"/n"<<"Enter the total numbers you are going to feed:";
cin>>numtot;
s.create(numtot);
s.display();
break;
case 2:
s.push();
break;
case 3:
a=s.pop();
s.display();
break;
case 4:
s.display();
break;
default:
break;
}
getch();
}while(ch<5)
return 0;
}