Switch Statement, varables' value changes

[Momentum]

Below is a switch statement, with the conditional varable ,*strItr, being an iterator to a string.
My problem is that when I enter a case, I'm able to create a Node, Node*, and have Node* point to &Node.

I'm able to successfully push the Node* in the nodePtrStack.
The nodePtrStack is declaraed outside of the for loop.

A reference to the element Node* in the stack is visible during debugging.

But when I break from case, the stack resets itself. The element Node* disappears and the stack is now empty, what Im I doing wrong?
I've been searching online but with no success.

thanks for any suggestion.

for(strItr = userPostfix.begin(); strItr != userPostfix.end(); strItr++)
 {


switch(*strItr){


  case 'T':
  case 't':
  {
  Node<string>truVar("T", NULL, NULL);
  Node<string>* ptruVar = &truVar;
  nodePtrStack.push(ptruVar);
  
  break;

  }