C/C++运算符的优先级
Precedence Operator Description Example Overloadable Associativity
1
::
Scope resolution operator
Class::age = 2;
no
none
2
()
()
[]
->
.
++
--
const_cast
dynamic_cast
static_cast
reinterpret_cast
typeid
Function call
Member initalization
Array access
Member access from a pointer
Member access from an object
Post-increment
Post-decrement
Special cast
Special cast
Special cast
Special cast
Runtime type information
isdigit('1')
c_tor(int x, int y) : _x(x), _y(y*10){};
array[4] = 2;
ptr->age = 34;
obj.age = 34;
for( int i = 0; i < 10; i++ ) cout << i;
for( int i = 10; i > 0; i-- ) cout << i;
const_cast<type_to>(type_from);
dynamic_cast<type_to>(type_from);
static_cast<type_to>(type_from);
reinterpret_cast<type_to>(type_from);
cout « typeid(type).name();
yes
yes
yes
yes
no
yes
yes
no
no
no
no
no
left to right
3
!
not
~
compl
++
--
-
+
*
&
new
new []
delete
delete []
(type)
sizeof
Logical negation
Alternate spelling for !
Bitwise complement
Alternate spelling for ~
Pre-increment
Pre-decrement
Unary minus
Unary plus
Dereference
Address of
Dynamic memory allocation
Dynamic memory allocation of array
Deallocating the memory
Deallocating the memory of array
Cast to a given type
Return size of an object or type
if( !done ) …
flags = ~flags;
for( i = 0; i < 10; ++i ) cout << i;
for( i = 10; i > 0; --i ) cout << i;
int i = -1;
int i = +1;
int data = *intPtr;
int *intPtr = &data;
long *pVar = new long;
MyClass *ptr = new MyClass(args);
delete pVar;
delete [] array;
int i = (int) floatNum;\\int size = sizeof(float);
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
no
right to left
4
->*
.*
Member pointer selector
Member object selector
ptr->*var = 24;
obj.*var = 24;
yes
no
left to right
5
*
/
%
Multiplication
Division
Modulus
int i = 2 * 4;
floa
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//-----------------
class A
{
public:
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{
printf( "base A\r\n" );
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{
printf( "base ~A\r\n" );
}
public:
virtual void VirtualFunc()
{
printf( "base VirtualFunc\r\n" );
};
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{
printf( "base Func\r\n" );
}
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