Code:

#ifndef _SYMBOL_
#define _SYMBOL_
#include <assert.h>

class Tree;

class Symbol {
	friend class Tree;
	private:
		char Character;
		Symbol *Parent, *LeftChild, *RightChild;
		bool Mark;
		float Probability;
		char CodeBit[16];
		int Depth;
	public:
		Symbol();
		Symbol(char,float);
		~Symbol();
};

//==========================================					
class Tree {
	public:
		Tree();
		~Tree();
		void insertSymbol(char, float);
		int showLength();
		void displayTree();
		int findLow();
		int markSymbol();
		void moveSymbols(Tree*);
		displaySymbol();
		void printTree(Symbol*);
		void printTree(void);
		void assignBits();
		void assignBits(Symbol*, char*);
		void writeTable(ofstream*);
		void writeTable(ofstream*,Symbol*);

	protected:
		Symbol *Root, *PtrCurrent;
		int Count;
		int Depth;
		Symbol* removeSymbol();
		int BranchCounter;
		void insertSymbol(Symbol*,Symbol*);
		void insertSymbol(Symbol*);
	};
			
#include "Symbol.cpp"
#endif