source_code
...........\nlsq_fit
...........\function_demos
...........\nlsq_fit\main.cpp
...........\........\data.txt
...........\........\data.cpp
...........\........\data.h
...........\........\spectrum_RSS.cpp
...........\........\simplex.h
...........\........\makefile
...........\function_demos\demo.cpp
...........\..............\simplex.h