Editing Operators in C and C++ (section)

=== Synonyms ===
C++ defines keywords to act as aliases for a number of operators:<ref name="Committee">{{cite book | title = ISO/IEC 14882:1998(E) Programming Language C++ | date = 1 September 1998 | publisher = open-std.org – The C++ Standards Committee | pages = 40–41}}</ref>
{| class="wikitable" style="width:30%; text-align:center;"
! Keyword || Operator
|-
| {{code|and}} || <code>&&</code>
|-
| {{code|and_eq}} || <code>&=</code>
|-
| {{code|bitand}} || <code>&</code>
|-
| {{code|bitor}} || <code>&#x7C;</code>
|-
| {{code|compl}} || <code>~</code>
|-
| {{code|not}} || <code>!</code>
|-
| {{code|not_eq}} || <code>!=</code>
|-
| {{code|or}} || <code>&#x7C;&#x7C;</code>
|-
| {{code|or_eq}} || <code>&#x7C;=</code>
|-
| {{code|xor}} || <code>^</code>
|-
| {{code|xor_eq}} || <code>^=</code>
|}

Each keyword is a different way to specify an operator and as such can be used instead of the corresponding symbolic variation. For example, {{code|1=(a > 0 and not flag)}} and {{code|1=(a > 0 && !flag)}} specify the same behavior. As another example, the <code>bitand</code> keyword may be used to replace not only the ''bitwise-and'' operator but also the ''address-of'' operator, and it can be used to specify reference types (e.g., {{code|1=int bitand ref = n}}). 

The ISO C specification makes allowance for these keywords as preprocessor macros in the header file [[iso646.h|{{code|iso646.h}}]]. For compatibility with C, C++ also provides the header {{code|iso646.h}}, the inclusion of which has no effect. Until C++20, it also provided the corresponding header [[ciso646|{{code|ciso646}}]] which had no effect as well.