How Do You Find what Version of C++ Is Installed?

Problem scenario
You have C++ installed. You want to know what version it is. What do you do?

Solution
Possible solution #1
Run this command: /usr/bin/cpp -v

Look for the word "version". Use CTRL-c to exit out.

Possible solution #2
Run these two commands:

. /opt/intel/bin/iccvars.sh intel64
icc -v

(Taken from https://superuser.com/questions/465949/how-to-know-what-version-of-c-compiler-is-installed-on-linux-server)