互相关是信号处理中的基本运算式，长用于地震资料的常规数字处理，应用C++语言实现此算法-Cross-correlation signal processing is the basic expression, long used in conventional digital seismic data processing, application C++ language this algorithm

C语言实现数字信号处理里面的DFT等功能 ，有界面-C language DFT features such as digital signal processing inside the interface