Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
register Keyword

register Keyword

The register keyword specifies that the variable is to be stored in a machine register, if possible.

register declarator ;

For example:

register int var;

Microsoft Specific

The compiler does not accept user requests for register variables; instead, it makes its own register choices when global register-allocation optimization (/Oe option) is on. However, all other semantics associated with the register keyword are honored.

END Microsoft Specific

ANSI C does not allow for taking the address of a register object; this restriction does not apply to C++. However, if the address-of operator (&) is used on an object, the compiler must put the object in a location for which an address can be represented. In practice, this means in memory instead of in a register.

Community Additions

ADD
Show:
© 2015 Microsoft