DFT源码，本程序是为了研究FFT和DFT 的具体原理做的实验，有详细的注解，删去注解即可运行的到结果，适合学习信号处理的朋友深入理解dft-DFT source, this procedure is to study the specific principle of FFT and DFT experiment, has detailed notes, delete annotations can run to the result, is suitable for the friends