centos 下安装g++

在centos下安装g++，如果输入 yum install g++，那么将会提示：

[root@hugo hugo]# yum -y install gcc-c++Loaded plugins: fastestmirror, refresh-packagekit, securityLoading mirror speeds from cached hostfile * base: centos.ustc.edu.cn * extras: centos.ustc.edu.cn * updates: centos.ustc.edu.cnSetting up Install ProcessResolving Dependencies--> Running transaction check---> Package gcc-c++.x86_64 0:4.4.7-3.el6 will be installed--> Processing Dependency: libstdc++-devel = 4.4.7-3.el6 for package: gcc-c++-4.4.7-3.el6.x86_64--> Running transaction check---> Package libstdc++-devel.x86_64 0:4.4.7-3.el6 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================ Package                 Arch           Version              Repository    Size================================================================================Installing: gcc-c++                 x86_64         4.4.7-3.el6          base         4.7 MInstalling for dependencies: libstdc++-devel         x86_64         4.4.7-3.el6          base         1.6 MTransaction Summary================================================================================Install       2 Package(s)Total download size: 6.3 MInstalled size: 20 MDownloading Packages:(1/2): gcc-c++-4.4.7-3.el6.x86_64.rpm                    | 4.7 MB     00:27     (2/2): libstdc++-devel-4.4.7-3.el6.x86_64.rpm            | 1.6 MB     00:08     --------------------------------------------Total                                           178 kB/s | 6.3 MB     00:36