fft.h

来自「一些在CCS上可以运行的初级DSP汇编程序」· C头文件 代码 · 共 23 行

#include "stdio.h"
#include "math.h"


class Ccomplex
{
public:
		double re,im;
public:
		Ccomplex(double r=0.,double i=0.) {re=r;im=i;}
		friend double real(Ccomplex);
		friend double imag(Ccomplex);
	    friend Ccomplex operator+(Ccomplex,Ccomplex);
		friend Ccomplex operator-(Ccomplex,Ccomplex);
		friend Ccomplex operator*(Ccomplex,Ccomplex);
		friend Ccomplex operator/(Ccomplex,Ccomplex);
		friend Ccomplex operator-(Ccomplex);
		//friend void print(Ccomplex);
		friend Ccomplex conj(Ccomplex);
		friend double abs(Ccomplex);
};
const double PI=double(atan(1.)*4.);
void fft(Ccomplex *x,int n,int inv);