 Extract this archive and copy the files to a directory. Then double-click FftFloat.sln. You need Visual Studio 2008 Standard Edition, if you don't have it, double-click on Exe file in Debug directory.
Microsoft Visual Studio starts. The project is FftFloat.
Choose "Solution" tab in the left window, then double-click FftFloatView.cpp.
Please look for FftCal function. iW[i] contains the input wave and tW[i]
does the trigonometric function.
The input wave and the trigonometric function are multiplied. You may find
triple-loops wrapping the calculation.
And please find that variables are defined as "double", that
is floating point number.
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