代码搜索：FFt 开发教程
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www.eeworm.com/read/192556/8375335
zip fft.zip
www.eeworm.com/read/192236/8396795
cpp fft.cpp
#include "stdafx.h"
#include "FFT.h"
int FFT(double *fr,double *fi,int n,int flag)
{
int mp,arg,q,cntr,p1,p2;
int i,j,a,b,k,m;
double sign,pr,pi,harm,x,y,t;
d
www.eeworm.com/read/192236/8396841
h fft.h
/*
频谱分析子程序
参数表：
n: 整型变量，输入参数，采样点数。
fr： 实型一维数组，输入兼输出参数，输入时存放n个采样点的实部，
输出时傅里叶变换（或逆傅里叶变换）的实部。
fi： 实型一维数组，输入兼输出参数，输入时存放n个采样点的虚部，
输出时傅里叶变换（或逆傅里叶变换）的虚部。
flag： 整型变量，输入参数，flag=0表示求 傅里叶变换，flag=1 ...
www.eeworm.com/read/391259/8413571
dsw fft.dsw
Microsoft Developer Studio Workspace File, Format Version 6.00
# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
###############################################################################
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plg fft.plg
Build Log
--------------------Configuration: fft - Win32 Debug--------------------
Command Lines
Creating temporary file "C:\DOCUME~1\GuanHua\L
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opt fft.opt
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ncb fft.ncb
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cpp fft.cpp
#include
#include
#include
#include
typedef struct{
double real;
double imag;
}COMPLEX;
#define PI 3.1415926
void GetOriginNumber( COMPLEX* or
www.eeworm.com/read/391259/8413587
dsp fft.dsp
# Microsoft Developer Studio Project File - Name="fft" - Package Owner=
# Microsoft Developer Studio Generated Build File, Format Version 6.00
# ** DO NOT EDIT **
# TARGTYPE "Win32 (x86) Conso
www.eeworm.com/read/391151/8419454
c fft.c
//FFT.c C callable FFT function in C
#define PTS 256 //# of points for FFT
typedef struct {float real,imag;} COMPLEX;
extern COMPLEX w[PTS]; //twiddle constants stored in w
v