Unbuffered low-level IO and Buffered high-level IO
Unbufferedlow-levelIOandBufferedhigh-levelIO1,概述Unix提供的函数如read,write等都属于UnbufferedIO函数。StandardIO提供的函数如fread,fwrite都属于BufferedIO函数。StandardIO的底层都是调用read,write来实现的。2,UnbufferedUnbuffered意味着每次调用read,wr