
1. in directory f2c_all/ya_f2c/f2c 
   - F2c
   - F2c.h
   - LIBF77
   - LIBIF77
   
   use F2c.exe to convert fortran source code to C code 
   (1) D:\fft>f2c -A  -r8 -P vfftpack.f
   (2) use ulta-edit to merge F2c.h and vfftpack.P and store as f2c.h
   (3) insert 
		#include <math.h> 
		to vfftpck.c and store as vfftpack.cpp
   (4) add f2c.h, vfftpack.cpp, LIBF77.lib, LIBI77.lib to project in order to link 

2. you can see f2c_all/f2c.ps for detailed information about f2c package

3. in directory cg_1d is a driver for vfftpack.c 
   I only test FFT package for 1-D 
   the vectorized FFT is not recommanded 