Beginning C++ 4

//this program shows that variables can exist
//in different scopes and can be called on
//a peice of code within that scope

#include <iostream.h>
void main()
{
  char ch = 'A';
  cout << "Tier " << ch << '\n';
  {
   char ch = 'B';
   cout << "Tier " << ch << '\n';
   {
     char ch = 'C';
     cout << "Tier " << ch << '\n';
   }
   cout << "Tier " << ch << '\n';
  }
  cout << "Tier " << ch << '\n';
}