sscanf字符拆分：
sscanf(strTmpName,"%4s_%12s_%4s%2s%2s_%2s%2s_%5s_%c",SatID,strWord,cy,cm,cd, ch,cn,wordTime,&wordFlag);
sprintf字符拼接：
sprintf(cBCALDataFileName,"%4s%2s%2s",cy,cm,cd);
linux\unix系统下的字符操作
原文：http://www.cnblogs.com/lovemyhuangmei/p/3980709.html
