用net-snmp API进行SNMP程序设计，获取snmp agent的信息，当然，首先，得安装net-snmp的库，编译源码时，需要用到两个库：netsnmp,crypto-SNMP program design with net-snmp API, get the SNMP agent information, of course, first of all, to install the net-snmp library, the compiler source code, need to use two libraries: netsnmp, crypto