这里应该是安装了xlC编译器吧，可是我应该怎么使用呢？
我用xlC, xlc, xlC.cpp都试过了，命令行找不到这个命令。
我现在就想编译一下我的c程序而已
------解决方案--------------------------------------------------------
直接cc your.c 呢？
------解决方案--------------------------------------------------------
直接使用/usr/vac/bin/xlC 或/usr/vacpp/bin/xlC 试试？或者自己加路径或软连接。
The compiler drivers are not automatically installed in /usr/bin/. To invoke the compiler without having to specify the full path, do one of the following:
Either
Create symbolic links for the specific drivers from /usr/vac/bin/ and /usr/vacpp/bin/ to /usr/bin/.
Example:
ln -s /usr/vacpp/bin/xlc /usr/bin/xlc
or
Add /usr/vac/bin/ and /usr/vacpp/bin/ to your PATH environment variable.
Example:
PATH=$PATH:/usr/vacpp/bin/
export PATH
可以参考手册:
http://publib.boulder.ibm.com/infocenter/lnxpcomp/v111v131/topic/com.ibm.xlcpp111.linux.doc/install/setshortinvoc
或到这儿(IBM 编译器中国开发团队的developerworks群组)提问：
https://www.ibm.com/developerworks/mydeveloperworks/groups/service/forum/topics?communityUuid=12bb75c9-dfec-42f5-8b55-b669cc56ad76
------解决方案--------------------------------------------------------
直接cc your.c 呢