FFT/IFFT 变换 C++源代码

//////////////////////////////////////////////////////////// //功能介绍：复数类定义 //编译环境：Microsoft Visual C++ //作者：maollm //时间：2011/11/26 //邮箱：maollm@126.com //////////////////////////////////////////////////////////// #include "Complex.h" complex::complex(float r,float i) //带参数的构造函数定义 { Real = r, Image = i; } complex operator*(const complex &a, const complex &b) //复数乘 { complex temp; temp.Real = a.Real*b.Real - a.Image*b.Image; temp.Image = a.Real*b.Image + a.Image*b.Real; return temp; } complex operator+(const complex &a, const complex &b) //复数加 { complex temp; temp.Real = a.Real + b.Real; temp.Image = a.Image + b.Image; return temp; } complex operator-(const complex &a, const complex &b) //复数减 { complex temp; temp.Real = a.Real - b.Real; temp.Image = a.Image - b.Image; return temp; } complex operator/(const complex &a, const complex &b) //复数除 { complex temp; temp.Real = (a.Real*b.Real + a.Image*b.Image) / (b.Real*b.Real + b.Image*b.Image); temp.Image = (a.Image*b.Real - a.Real*b.Image) / (b.Real*b.Real + b.Image*b.Image); return temp; } complex operator*(const complex &a, const float &b) //复数与浮点乘 { complex temp; temp.Real = a.Real * b; temp.Image = a.Image * b; return temp; } complex operator+(const complex &a, const float &b) //复数与浮点加 { complex temp; temp.Real = a.Real + b; temp.Image = a.Image; return temp; } complex operator-(const complex &a, const float &b) //复数与浮点减 { complex temp; temp.Real = a.Real - b; temp.Image = a.Image; return temp; } complex operator/(const complex &a, const float &b) //复数与浮点除 { complex temp; temp.Real = a.Real / b; temp.Image = a.Image / b; return temp; } complex operator-(const complex &a) //复数取负运算 { return complex(-a.Real, -a.Image); } void complex::change_Real_to(float val) //输入实部 { Real = val; } void complex::change_Image_to(float val) //输入虚部 { Image = val; } void complex::output_value() //复数输出 { cout<<setiosflags(ios::fixed)<<setiosflags(ios::left)<<setprecision(4) << Real << " " << Image << "i" << "\n"; }