void stack::Pop()
{
if(size!=0)
   {
              --size;
              tab=(int*)realloc(tab, size*sizeof(int));
   }else
   {
              cout<<"Stos jest pusty, nie mozna usunac elementow!"<<endl;
   }
}

----------------------------------------------------------------------

if(size!=0)--size;
tab=(int*)realloc(tab, size*sizeof(int));
23:29:27
if(size!=0)
{
--size;
tab=(int*)realloc(tab, size*sizeof(int));
}