实现快速傅立叶变换的C程序代码，以基2FFT为基础的算法-Implementation of fast Fourier transform C program code, to base 2FFT based algorithm

运用C语言环境，实现基-2FFT运算，从而实现复杂的由时域分析转向频域分析的计算-Using C language environment and realize the base-2FFT operation, in order to achieve the complex time-domain analysis by calculating the frequency domain analysis of the steering