1、安装方式一：能上网
Yum安装
[[email protected] module]# yum install gcc-c++
2、安装方式一：不能上网
（1）挂载CentOS，建立挂载点
[[email protected] media]# mkdir CentOS_6.8
（2）设备/dev/cdrom挂载到 挂载点 ： /mnt/CentOS_6.8中
[[email protected] media]# mount -t iso9660 /dev/cdrom /media/CentOS_6.8/
（3）卸载挂载的光盘
[[email protected] ~]# umount /media/CentOS_6.8/
（4）开机自动挂载
[[email protected] ~]# vim /etc/fstab
/dev/cdrom /media/CentOS_6.8 iso9660 defaults 0 0
（5）进入安装包目录,依次执行以下
[[email protected] ~]# cd /media/CentOS_6.8/Packages/
[[email protected] Packages]# rpm -ivh mpfr-2.4.1-6.el6.x86_64.rpm
[[email protected] Packages]# rpm -ivh cpp-4.4.7-17.el6.x86_64.rpm
[[email protected] Packages]# rpm -ivh ppl-0.10.2-11.el6.x86_64.rpm
[[email protected] Packages]# rpm -ivh cloog-ppl-0.15.7-1.2.el6.x86_64.rpm
[[email protected] Packages]# rpm -ivh gcc-4.4.7-17.el6.x86_64.rpm