Analysis of information sources in references of the Wikipedia article "اشارهگر هیچمقدار" in Persian language version.
const
qualifier (§5.4) prevents accidental redefinition of NULL
and ensures that NULL
can be used where a constant is required.". The C++ Programming Language (14th printing of 3rd ed.). United States and Canada: Addison–Wesley. p. 88. ISBN 0-201-88954-4.{{cite journal}}
: Cite journal requires |journal=
(help)