Stack- Array-Template

#include<bitz/stdc++.h>
using namespace std;


template<class T>
class Stack
{
private:
  T *s;
  int top;
  int size;
public:
   Stack(int size)
   {
     this->size=size;
     top=-1;
     st=new T[this->size];
   }
   
    void push(T x);
    T pop();
    T peek(int index);
    void Display();
 };
 
 template<class T>
 void Stack<T>::push(T x)
 {
     if(isFull())
     cout<<"Stack is full";
     else
     {
        top++;
        s[top]=x;
      }
      
}      
        
template<class T>
 T Stack<T>::pop()
 {   
      T x=-1;
     if(isEmpty())
     cout<<"Stack is empty";
     else
     {
        x=st[top];
        top--;
      }
     return x; 
      
}          

template<class T>
 T Stack<T>::peep(int index)
 {   
      T x=-1;
      if(top-index+1<0)
      {
      cout<<"Invalid Index";
      }
      else
      {
      x = s[top-index+1];
      }
     return x; 
      
}  

template<class T>
 void Stack<T>::Display()
 {   
    
     if(isEmpty())
     cout<<"Stack is empty";
     else
     {
       for(int i=top;i>=0;i--)
       cout<<s[i]<<endl;
      }
 
 
}          
     
  
int main()
{
cout<<"Enter the size of the stack"<<endl;
int size;
cin>>size;
 Stack<char> st(size);

for(int i=0;i<size;i++)
{
cout<<"Enter the charachter you want to push";
char ch;
cin>>ch;
st.push(ch);
}

 st.Display();

 cout<<st.peek(1)<<endl;
cout<<st.pop()<<endl;

 return 0;
}