C语言实现数字信号处理算法

C语言实现数字信号处理算法附录A1  BC下复数类型的实现1、利用BC提供的复数支持//BC中使用复数类型使用示例(ComplexUse.Cpp文件)#include  <iostream.h>#include  <complex.h>int  main(void){double  x  =  3.1,  y  =  4.2;complex  z  =  complex(x,y);cout  <<  "z  =  "<<  z  <<  "

";cout  <<  "  and  imaginary  real  part  =  "  <<  imag(z)  <<  "

";cout  <<  "z  has  complex  conjugate  =  "  <<  conj(z)  <<  " 

";return  0;}2、定义复数类，填写相应成员函数//C中的复数类型调用时可能不是非常好用，可自己定义复数类(ComplexUse.Cpp文件)class  Complex{public:Complex(){}Complex(  float  re,  float  im  );float  r(){return  real;};float  i(){return  imag;};float  mod(){return  sqrt(real*real+imag*imag);};Complex  operator+(  Complex  &other  );Complex  operator-(  Complex  &other  );Complex  operator*(  Complex  &other  );Complex  operator/(  Complex  &other  );private:float  real,  imag;};//  Operator  overloaded  using  a  member  functionComplex::Complex(float  re,float  im){real=re;imag=im;};Complex  Complex::operator+(  Complex  &other  ){return  Complex(  real  +  other.real,  imag  +  other.imag  );};Complex  Complex::operator-(  Complex  &other  ){return  Complex(  real  -  other.real,  imag  -  other.imag  );};Complex  Complex::operator*(  Complex  &other  ){float  x,y;x=real*other.real-imag*other.imag;y=real*other.imag+imag*other.real;return  Complex(  x,y  );};Complex  Complex::operator/(  Complex  &other  ){float  x,y,l;l=other.real*other.real+other.imag*other.imag;x=real*other.real+imag*other.imag;y=other.real*imag-real*other.imag;x=x/l;y=y/l;return  Complex(x,y);};