C language memo - operator precedence

　　Ashamed ah, today wrote an algorithm problem, for the first time did not write right. Leng Shimo change for a long time see what was wrong, say about the process back, suddenly found operator precedence angered disaster if (! Num% 2) {......} ,! The operation% higher priority than, ah ah ah, I found a frenzied ten minutes, gave the old head disgrace. In order to avoid such a stupid mistake, so write this blog about the consolidation of operator precedence.

　　Not a lot to say, directly on the table.

　　

priority	Operators	name	Instructions	Order of operations	Explanation
1	[]	Array subscript	Array name [integer expression]	Left to right
	()	Parentheses	(Expression) / function name (parameter list)
	.	Member selection (objects)	Object. Member Name
	->	Member selection (pointer)	Object pointer -> member name
2	-	Operators negative	- type arithmetic expressions	Right to Left	Unary operator
	(type)	Cast	(Scalar data type) scalar expression
	++	Increment operator	++ scalar type can modify lvalue expression		Unary operator
	--	Decrement operator	- scalar type modifiable lvalue expression		Unary operator
	*	Dereferencing operator	* Pointer type expression		Unary operator
	&	The address operator	&expression		Unary operator
	!	Logical NOT operator	! Scalar type expression		Unary operator
	~	Bitwise operator	~ Integer expression		Unary operator
	sizeof	Operators length	sizeof expressions sizeof (Type)
3	/	except	Expressions / Expression	Left to right	Binary operator
	*	Multiply	Expression * expression		Binary operator
	%	The remainder (modulo)	Integer expression integer expression%		Binary operator
4	+	plus	Expression + expression	Left to right	Binary operator
	-	Less	Expressions - Expressions		Binary operator
5	<<	The left	Integer expression << integer expression	Left to right	Binary operator
	>>	Right	>> integer expression integer expression		Binary operator
6	>	more than the	Expressions> Expressions	Left to right	Binary operator
	>=	greater or equal to	Expression> = expression		Binary operator
	<	Less than	Expression <expression		Binary operator
	<=	Less than or equal	Expression <= expression		Binary operator
7	==	equal	Expression == expression	Left to right	Binary operator
	!=	not equal to	Expression! = Expression		Binary operator
8	&	Bitwise AND	Integer expression & integer expression	Left to right	Binary operator
9	^	Bitwise XOR	Integer expression ^ integer expression	Left to right	Binary operator
10	|	Bitwise or	Integer expression | integer expression	Left to right	Binary operator
11	&&	Logic and	Expression && expression	Left to right	Binary operator
12	||	Logical or	Expressions Expressions ||	Left to right	Binary operator
13	?:	Conditional operator	Expression 1 Expression 2:? Expression 3	Right to Left	Ternary operator
14	=	Assignment Operators	Modifiable lvalue expression = Expression	Right to Left	by =
	/=	In addition to the assignment	Value of the expression may be modified left / Expression =		by =
	*=	Take after the assignment	Modifiable lvalue expression * = Expression		by =
	%=	After the assignment modulo	Modifiable lvalue expression = Expression%		by =
	+=	After the addition of the assignment	Value of the expression may be modified left + = expression		by =
	-=	After subtraction assignment	Modifiable lvalue expression - expression =		by =
	<<=	Left after the assignment	可修改左值表达式<<=表达式		op=
	>>=	右移后赋值	可修改左值表达式>>=表达式		op=
	&=	按位与后赋值	可修改左值表达式&=表达式		op=
	^=	按位异或后赋值	可修改左值表达式^=表达式		op=
	|=	按位或后赋值	可修改左值表达式|=表达式		op=

注意到了吗？并不是所有的逻辑运算符都在算数运算符后面 ！这玩意就是特例，而且，逻辑运算符也是有优先级的（离散数学里讲过）所以运算符优先级应该是

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