char *home = getenv("HOME");//获取当前系统的HOME变量,若系统中当前无该系统变量,返回NULL cout<<"HOME="<<home<<endl; return 0; } 运行结果: TOOLKIT_HOME=/usr/local/toolkit RANK_HOME=/usr/local/rank EMAILMONITOR_HOME=/usr/local/emailmonitor NOVA_HOME=/usr/local/include/nova HOSTNAME=sjs...