This document contains C++ code that defines two classes: Histogram and Statistics. The Histogram class is used to store and represent histogram data, including a vector of doubles for the data, minimum value, and bin size. The Statistics class contains various public methods for initializing simulation parameters, logging field visits and salesman data, writing data to files, processing the data by dividing, smoothing, and calculating statistics like midpoint and variance. It stores the logged data and simulation parameters as private member variables.