这是离散傅里叶正变换和逆变换的源程序，很经典。希望能提供给需要的人-This is the discrete Fourier transform and inverse transform of the source, it is classic. Hope to those who need

离散傅里叶变换及其反变换。c语言编程实现，包含复数类的定义-The discrete fourier transform and its inverse transform. C programming language, defined to include the plural class