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Viterbi Algorithm in C++ and using STL

To practice my C++ and STL skills, I implemented the Viterbi algorithm example from the Wikipedia page: http://en.wikipedia.org/wiki/Viterbi_algorithm. The original algorithm was implemented in Python. I reimplemented the example in C++ and I used STL (mainly vector and map classes).  This code is in public-domain. So, use it as you want. 
The complete solution for MS Visual C++ 2008 can be found at http://filip.jurcicek.googlepages.com/ViterbiSTL.rar

// ViterbiSTL.cpp : is an C++ and STL implementatiton of the Wikipedia example // Wikipedia: http://en.wikipedia.org/wiki/Viterbi_algorithm#A_concrete_example
// It as accurate implementation as it was possible

#include "stdafx.h"
#include "string" #include "vector" #include "map" #include "iostream"
using namespace std;
//states = ('Rainy', 'Sunny') //  //observations = ('walk', 'shop', 'clean') //  //start_probability = {'Rainy': 0.6, 'Sunny': 0.…