everest% CC -c main4.C
"main4.C", line 11: error(1304): "BSTreeNode::BSTreeNode()" is inaccessible
     BSTreeNode Node, *Nptr ;
                ^

"main4.C", line 11: error(1304): "BSTreeNode::~BSTreeNode()" is inaccessible
     BSTreeNode Node, *Nptr ;
                ^

"main4.C", line 13: error(1304): "BSTreeNode::BSTreeNode()" is inaccessible
     Nptr = new BSTreeNode ;
                ^

3 errors detected in the compilation of "main4.C".
everest%