有没有官方发布的个数？不是那种自己算出来的。
解决方案：18分
//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. //+------------------+-----------------------------------------+---------------+ //| Operator | Name or Meaning | Associativity | //+------------------+-----------------------------------------+---------------+ //| :: | Scope resolution | None | //| :: | Global | None | //| [ ] | Array subscript | Left to right | //| ( ) | Function call | Left to right | //| ( ) | Conversion | None | //| . | Member selection (object) | Left to right | //| -> | Member selection (pointer) | Left to right | //| ++ | Postfix increment | None | //| -- | Postfix decrement | None | //| new | Allocate object | None | //| delete | Deallocate object | None | //| delete[ ] | Deallocate object | None | //| ++ | Prefix increment | None | //| -- | Prefix decrement | None | //| * | Dereference | None | //| & | Address-of | None | //| + | Unary plus | None | //| - | Arithmetic negation (unary) | None | //| ! | Logical NOT | None | //| ~ | Bitwise complement | None | //| sizeof | Size of object | None | //| sizeof ( ) | Size of type | None | //| typeid( ) | type name | None | //| (type) | Type cast (conversion) | Right to left | //| const_cast | Type cast (conversion) | None | //| dynamic_cast | Type cast (conversion) | None | //| reinterpret_cast | Type cast (conversion) | None | //| static_cast | Type cast (conversion) | None | //| .* | Apply pointer to class member (objects) | Left to right | //| ->* | Dereference pointer to class member | Left to right | //| * | Multiplication | Left to right | //| / | Division | Left to right | //| % | Remainder (modulus) | Left to right | //| + | Addition | Left to right | //| - | Subtraction | Left to right | //| << | Left shift | Left to right | //| >> | Right shift | Left to right | //| < | Less than | Left to right | //| > | Greater than | Left to right | //| <= | Less than or equal to | Left to right | //| >= | Greater than or equal to | Left to right | //| == | Equality | Left to right | //| != | Inequality | Left to right | //| & | Bitwise AND | Left to right | //| ^ | Bitwise exclusive OR | Left to right | //| | | Bitwise OR | Left to right | //| && | Logical AND | Left to right | //| || | Logical OR | Left to right | //| e1?e2:e3 | Conditional | Right to left | //| = | Assignment | Right to left | //| *= | Multiplication assignment | Right to left | //| /= | Division assignment | Right to left | //| %= | Modulus assignment | Right to left | //| += | Addition assignment | Right to left | //| -= | Subtraction assignment | Right to left | //| <<= | Left-shift assignment | Right to left | //| >>= | Right-shift assignment | Right to left | //| &= | Bitwise AND assignment | Right to left | //| |= | Bitwise inclusive OR assignment | Right to left | //| ^= | Bitwise exclusive OR assignment | Right to left | //| , | Comma | Left to right | //+------------------+-----------------------------------------+---------------+
解决方案：1分
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 & | ~
! = < > += -= *= /= %=
ˆ= &= |= << >> >>= <<= == !=
<= >= && || ++ -- , ->* ->
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).
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