问题
Why are there different PDF versions of the ISO/IEC 14882:2011 standard (C++11), which cost from $30 to $761? (see http://webstore.ansi.org or any other distributor)
btw.: Has the INCITS $30 version just been published? It's available at the ANSI web store, but not at the INCITS web store..
回答1:
It's just the way the standards organizations work. They're not competing with each other to get your business.
You can basically get the C++11 standard for free anyway. See n3337 here. It's the standard plus the first few post-standardization corrections of typos and the like.
来源：https://stackoverflow.com/questions/9771868/c11-standard-document-costs