Editing Operators in C and C++ (section)

===Assignment===

C and C++ have the same assignment operators and all can be overloaded in C++.

For the combination operators, <code>a ⊚= b</code> (where <code>⊚</code> represents an operation) is equivalent to <code>a = a ⊚ b</code>, except that <code>a</code> is evaluated only once.

{| class="wikitable" style="width:100%"
! rowspan="2" | Operation
! rowspan="2" | Syntax 
! colspan="2" | C++ prototype
|-
! in class K
! outside class
|-
! {{rh}} | [[Assignment operator (C++)|Assignment]] 
| style="text-align:center;" | {{nowrap| 1=<code>a '''=''' b</code>}}
| {{cpp|1=R& K::operator =(S b);}}
| {{n/a}}
|-
! {{rh}} | Addition combination
| align="center" | <code>a '''+=''' b</code>
| {{cpp|1=R& K::operator +=(S b);}}
| {{cpp|1=R& operator +=(K& a, S b);}}
|-
! {{rh}} | Subtraction combination 
| style="text-align:center;" | <code>a '''-=''' b</code>
| {{cpp|1=R& K::operator -=(S b);}}
| {{cpp|1=R& operator -=(K& a, S b);}}
|-
! {{rh}} | Multiplication combination 
| style="text-align:center;" | <code>a '''*=''' b</code>
| {{cpp|1=R& K::operator *=(S b);}}
| {{cpp|1=R& operator *=(K& a, S b);}}
|-
! {{rh}} | Division combination
| style="text-align:center;" | <code>a '''/=''' b</code>
| {{cpp|1=R& K::operator /=(S b);}}
| {{cpp|1=R& operator /=(K& a, S b);}}
|-
! {{rh}} | Modulo combination 
| style="text-align:center;" | <code>a '''%=''' b</code> 
| {{cpp|1=R& K::operator %=(S b);}}
| {{cpp|1=R& operator %=(K& a, S b);}}
|-
! {{rh}} | Bitwise AND combination
| style="text-align:center;" | <code>a '''&=''' b</code>
| {{cpp|1=R& K::operator &=(S b);}}
| {{cpp|1=R& operator &=(K& a, S b);}}
|-
! {{rh}} | Bitwise OR combination 
| style="text-align:center;" | <code>a '''<nowiki>|</nowiki>=''' b</code>
| {{cpp|1=R& K::operator {{!}}=(S b);|lang=cpp}}
| {{cpp|1=R& operator {{!}}=(K& a, S b);|lang=cpp}}
|-
! {{rh}} | Bitwise XOR combination
| style="text-align:center;" | <code>a '''^=''' b</code>
| {{cpp|1=R& K::operator ^=(S b);}}
| {{cpp|1=R& operator ^=(K& a, S b);}}
|-
! {{rh}} | Bitwise left shift combination
| style="text-align:center;" | <code>a '''<<=''' b</code>
| {{cpp|1=R& K::operator <<=(S b);}}
| {{cpp|1=R& operator <<=(K& a, S b);}}
|-
! {{rh}} | Bitwise right shift combination{{Refn | name="rightbitshift" | group="lower-alpha" | According to the C99 standard, the right shift of a negative number is implementation defined. Most implementations, e.g., the GCC,<ref name="Integers">{{Citation | contribution = Integers implementation | url = //gcc.gnu.org/onlinedocs/gcc-4.3.3/gcc/Integers-implementation.html#Integers-implementation | title = GCC 4.3.3 | publisher = GNU}}.</ref> use an [[arithmetic shift]] (i.e., sign extension), but a [[logical shift]] is possible.}}
| style="text-align:center;" | <code>a '''>>=''' b</code>
| {{cpp|1=R& K::operator >>=(S b);}}
| {{cpp|1=R& operator >>=(K& a, S b);}}
|}