unable to understand c++ union

[puneetmishramau]

hello friends
i am somwhat unable to understand union in c++.please guide me to understand for the same.
thanks puneet

[elpis]

http://www.cplusplus.com/doc/tutorial/other_data_types.html
or use MSDN
http://msdn.microsoft.com/en-us/library/y9zewe0d(VS.80).aspx