说明：  数字信号处理：实现对32点矩形序列和x(n)=n+1序列分别进行DFT，两者线形卷积，原序列补点至63点后的DFT和对DFT乘积的IDFT。显示为数值和坐标轴中的图像。vista系统不能看图。在win-c下编译，c语言
(Digital signal processing: to achieve 32 points, rectangular sequence and x (n) = n+1 sequences were carried out DFT, linear convolution between the original sequence of fill points to 63 points, after the DFT and the DFT product of IDFT. Shown as values and axis in the image. vista system can not plug-in. In the win-c compiled, c language)