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Posts I've Made

  1. In Topic: Trouble Compiling with fatal "multiply-defined" errors in UNIX

    Posted 1 Dec 2011

    I see, but how am I supposed to have both my default constructor and my explicit value constructor if the compiler sees it as multiply defined?

  2. In Topic: "Class has not been declared" issue

    Posted 1 Dec 2011

    I can compile BST.cpp by itself using g++ BST.cpp -c

    But I cannot compile all 3 files together with g++ BST.cpp BST.h TreeNode.h

    I suppose I need to write a main() function in order to compile all of the files to write to a.out

  3. In Topic: "Class has not been declared" issue

    Posted 1 Dec 2011

    View Postjimblumberg, on 01 December 2011 - 02:32 PM, said:

    In the following snippet:
    void BST::insert(const int & item)
{
   BST::TreeNodePointer
        locptr = myRoot,   // search pointer
        parent = 0;        // pointer to parent of current node

   if (!found)
   {                                 // construct node containing item
      locptr = new BST::TreeNode(item);


    You do not need the BST:: . This function is part of BST so it has access to all members of this class. By adding this BST:: you are just confusing yourself and the compiler.

    Jim


    Yes, I learned that I do not need this. My code currently looks like

    void BST::insert(const int & item)
{
   TreeNodePointer
        locptr = myRoot,   // search pointer
        parent = 0;        // pointer to parent of current node
   bool found = false;     // indicates if item already in BST
   while (!found && locptr != 0)
   {
      parent = locptr;
      if (item < locptr->data)       // descend left
         locptr = locptr->Lchild;
      else if (locptr->data < item)  // descend right
         locptr = locptr->Rchild;
      else                           // item found
         found = true;
   }
   if (!found)
   {                                 // construct node containing item
      locptr = new TreeNode(item);
      if (parent == 0)               // empty tree
         myRoot = locptr;
      else if (item < parent->data )  // insert to left of parent
         parent->Lchild = locptr;
      else                           // insert to right of parent
         parent->Rchild = locptr;
   }
   else
      cout << "Item already in the tree\n";
}


    When I compile I get

    "Undefined first referenced
    symbol in file
    main /usr/local/lib/gcc/sparc-sun-solaris2.8/3.4.6/crt1.o
    ld: fatal: Symbol referencing errors. No output written to a.out
    collect2: ld returned 1 exit status"

  4. In Topic: "Class has not been declared" issue

    Posted 1 Dec 2011

    Could someone please help me figure out why I am getting the error?:

    "Undefined first referenced
    symbol in file
    main /usr/local/lib/gcc/sparc-sun-solaris2.8/3.4.6/crt1.o
    ld: fatal: Symbol referencing errors. No output written to a.out
    collect2: ld returned 1 exit status"

  5. In Topic: "Class has not been declared" issue

    Posted 28 Nov 2011

    View Postvividexstance, on 28 November 2011 - 04:01 PM, said:

    You made a typedef in the BST class called "TreeNodePointer". However, in the BST.cpp file, you refer to just a "TreeNode" and you qualify it with "BST::". Since "TreeNode" is not declared inside "BST", you are getting this error. You either need to drop the explicit qualification or just change the "TreeNode" to "TreeNodePointer".


    I cannot change "TreeNode" to "TreeNodePointer" because TreeNodePointer is a pointer to a TreeNode, and I cannot construct a pointer. If I drop the "BST::" then I get the error

    "Undefined first referenced
    symbol in file
    main /usr/local/lib/gcc/sparc-sun-solaris2.8/3.4.6/crt1.o
    ld: fatal: Symbol referencing errors. No output written to a.out
    collect2: ld returned 1 exit status"

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