⎣x⎦, 3.21
! (logical negation operator), 6.5.3.3
逻辑非运算符
!= (inequality operator), 6.5.9
不等于运算符
# operator, 6.10.3.2
#运算符
# preprocessing directive, 6.10.7
#预处理指令（指示）
# punctuator, 6.10
#标点
## operator, 6.10.3.3
##运算符
#define preprocessing directive, 6.10.3
#define预处理指令（指示）
#elif preprocessing directive, 6.10.1
#elif 预处理指令（指示）
#else preprocessing directive, 6.10.1
#else 预处理指令（指示）
#endif preprocessing directive, 6.10.1
#endif 预处理指令（指示）
#error preprocessing directive, 4, 6.10.5
#error 预处理指令（指示）
#if preprocessing directive, 5.2.4.2.1, 5.2.4.2.2,
#if 预处理指令（指示）
#ifdef preprocessing directive, 6.10.1
#ifdef 预处理指令（指示）
#ifndef preprocessing directive, 6.10.1
#ifndef 预处理指令（指示）
#include preprocessing directive, 5.1.1.2, 6.10.1, 7.1.4 6.10.2
#include 预处理指令（指示）
#line preprocessing directive, 6.10.4
#pragma preprocessing directive, 6.10.6
#undef preprocessing directive, 6.10.3.5, 7.1.3,
7.1.4
% (remainder operator), 6.2.6.2, 6.5.5
%: (alternative spelling of #), 6.4.6
%:%: (alternative spelling of ##), 6.4.6
%= (remainder assignment operator), 6.5.16.2
%> (alternative spelling of }), 6.4.6
& (address operator), 6.3.2.1, 6.5.3.2
& (bitwise AND operator), 6.2.6.2, 6.5.10
&& (logical AND operator), 5.1.2.4, 6.5.13
&= (bitwise AND assignment operator), 6.5.16.2
' '(space character), 5.1.1.2, 5.2.1, 6.4, 7.4.1.3,
7.4.1.10, 7.30.2.1.3
( )(cast operator), 6.5.4
( )(function-call operator), 6.5.2.2
( )(parentheses punctuator), 6.7.6.3, 6.8.4, 6.8.5
( ){ }(compound-literal operator), 6.5.2.5
* (asterisk punctuator), 6.7.6.1, 6.7.6.2
* (indirection operator), 6.5.2.1, 6.5.3.2
* (multiplication operator), 6.2.6.2, 6.5.5, F.3,
G.5.1
*= (multiplication assignment operator), 6.5.16.2
+ (addition operator), 6.2.6.2, 6.5.2.1, 6.5.3.2,
6.5.6, F.3, G.5.2
相加运算符
+ (unary plus operator), 6.5.3.3
一元正（加）运算符
++ (postfix increment operator), 6.3.2.1, 6.5.2.4
++ (prefix increment operator), 6.3.2.1, 6.5.3.1
+= (addition assignment operator), 6.5.16.2
相加赋值运算符
