请教c++有多少个运算符
请问c++有多少个运算符
有没有官方发布的个数？不是那种自己算出来的。百度居然搜不到
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------解决思路----------------------
很遗憾标准没有单独列出运算符 (operator) 。
但是有如下一个列表（这不是运算符列表）：
2.13 Operators and punctuators [lex.operators]
1 The lexical representation of C++ programs includes a number of preprocessing tokens which are used in
the syntax of the preprocessor or are converted into tokens for operators and punctuators:
preprocessing-op-or-punc: one of
Each preprocessing-op-or-punc is converted to a single token in translation phase 7 (2.2).
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C++ Operator Precedence
有没有官方发布的个数？不是那种自己算出来的。百度居然搜不到
------解决思路----------------------
//C++ Operators
// Operators specify an evaluation to be performed on one of the following:
// One operand (unary operator)
// Two operands (binary operator)
// Three operands (ternary operator)
// The C++ language includes all C operators and adds several new operators.
// Table 1.1 lists the operators available in Microsoft C++.
// Operators follow a strict precedence which defines the evaluation order of
//expressions containing these operators. Operators associate with either the
//expression on their left or the expression on their right; this is called
//“associativity.” Operators in the same group have equal precedence and are
//evaluated left to right in an expression unless explicitly forced by a pair of
//parentheses, ( ).
// Table 1.1 shows the precedence and associativity of C++ operators
// (from highest to lowest precedence).
//
//Table 1.1 C++ Operator Precedence and Associativity
// The highest precedence level is at the top of the table.
//+------------------+-----------------------------------------+---------------+
//
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Operator
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Name or Meaning
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Associativity
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//+------------------+-----------------------------------------+---------------+
//
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::
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Scope resolution
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None
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//
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::
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Global
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None
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//
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[ ]
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Array subscript
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Left to right
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//
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( )
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Function call
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Left to right
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//
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( )
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Conversion
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None
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//
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.
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Member selection (object)
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Left to right
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//
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->
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Member selection (pointer)
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Left to right
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//
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++
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Postfix increment
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None
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//
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--
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Postfix decrement
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None
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//
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new
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Allocate object
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None
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//
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delete
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Deallocate object
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None
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//
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delete[ ]
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Deallocate object
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None
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//
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++
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Prefix increment
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None
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//
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--
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Prefix decrement
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None
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//
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*
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Dereference
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None
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//
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&
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Address-of
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None
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//
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+
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Unary plus
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None
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//
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-
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Arithmetic negation (unary)
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None
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//
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!
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Logical NOT
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None
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//
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~
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Bitwise complement
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None
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//
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sizeof
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Size of object
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None
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//
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sizeof ( )
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Size of type
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None
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//
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typeid( )
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type name
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None
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//
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(type)
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Type cast (conversion)
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Right to left
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//
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const_cast
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Type cast (conversion)
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None
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//
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dynamic_cast
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Type cast (conversion)
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None
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//
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reinterpret_cast
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Type cast (conversion)
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None
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//
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static_cast
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Type cast (conversion)
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None
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//
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.*
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Apply pointer to class member (objects)
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Left to right
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//
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->*
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Dereference pointer to class member
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Left to right
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//
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*
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Multiplication
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Left to right
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//
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/
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Division
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Left to right
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//
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%
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Remainder (modulus)
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Left to right
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//
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+
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Addition
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Left to right
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//
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-
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Subtraction
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Left to right
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//
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<<
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Left shift
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Left to right
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//
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>>
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Right shift
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Left to right
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//
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<
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Less than
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Left to right
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//
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>
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Greater than
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Left to right
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//
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<=
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Less than or equal to
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Left to right
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//
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>=
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Greater than or equal to
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Left to right
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//
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==
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Equality
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Left to right
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//
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!=
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Inequality
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Left to right
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//
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&
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Bitwise AND
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Left to right
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//
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^
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Bitwise exclusive OR
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Left to right
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//
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------解决思路----------------------
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Bitwise OR
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Left to right
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//
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&&
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Logical AND
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Left to right
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//
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------解决思路----------------------
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Logical OR
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Left to right
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//
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e1?e2:e3
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Conditional
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Right to left
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//
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=
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Assignment
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Right to left
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//
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*=
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Multiplication assignment
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Right to left
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//
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/=
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Division assignment
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Right to left
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//
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%=
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Modulus assignment
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Right to left
------解决思路----------------------
//
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+=
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Addition assignment
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Right to left
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//
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-=
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Subtraction assignment
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Right to left
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//
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<<=
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Left-shift assignment
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Right to left
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//
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>>=
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Right-shift assignment
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Right to left
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//
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&=
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Bitwise AND assignment
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Right to left
------解决思路----------------------
//
------解决思路----------------------
------解决思路----------------------
=
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Bitwise inclusive OR assignment
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Right to left
------解决思路----------------------
//
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^=
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Bitwise exclusive OR assignment
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Right to left
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//
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,
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Comma
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Left to right
------解决思路----------------------
//+------------------+-----------------------------------------+---------------+
------解决思路----------------------
很遗憾标准没有单独列出运算符 (operator) 。
但是有如下一个列表（这不是运算符列表）：
2.13 Operators and punctuators [lex.operators]
1 The lexical representation of C++ programs includes a number of preprocessing tokens which are used in
the syntax of the preprocessor or are converted into tokens for operators and punctuators:
preprocessing-op-or-punc: one of
{ } [ ] # ## ( )
<: :> <% %> %: %:%: ; : ...
new delete ? :: . .*
+ - * / % ˆ &
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~
! = < > += -= *= /= %=
ˆ= &=
------解决思路----------------------
= << >> >>= <<= == !=
<= >= &&
------解决思路----------------------
++ -- , ->* ->
and and_eq bitand bitor compl not not_eq
or or_eq xor xor_eq
Each preprocessing-op-or-punc is converted to a single token in translation phase 7 (2.2).
------解决思路----------------------
C++ Operator Precedence