C++ Program on A simple stack example: push, empty, pop and top

    #include <iostream>
   #include <stack>
   using namespace std;
   int main()
   {
     stack<char> stackObject;
     stackObject.push('A');
     stackObject.push('B');
     stackObject.push('C');
     stackObject.push('D');
     while(!stackObject.empty())
     {
       cout << "Popping: ";
       cout << stackObject.top() << endl;
       stackObject.pop();
     }
     return 0;
   }