此文档是使用C语言实现数字滤波，对高通或低通滤波器的C语言程序介绍。,This document is the use of C language realization of digital filter for high-pass or low-pass filter to introduce the C language program.

IEEE Std 738-2006 Front Cover Introduction Notice to users Participants CONTENTS IEEE Standard for Calculating the Current-Temperature of Bare Overhead Conductors 1. Overview 1.1 Scope 1.2 Disclaimer 2. Definitions 3. Temperature calculatio