C语言中的符号重载(Expert C Programming笔记)

原来一直搞不清楚 C 中static ,extern 在各个地方的含义 今天发现在expert c programming 中的总结算是搞明白了

Symbol	Meaning
static	Inside a function, retains its value between calls. At the function level, visible only this file.
extern	Applied to a function definition, has global scope ( and is redundant). Applied to a variable, defined elsewhere.
Void	As the return type of function, doesn’t return a value. In a pointer declaration, the type of a generic pointer. In a parameter list, takes no parameters.
*	The multiplication operator. Applied to a pointer, indirection. In a declaration, a pointer.
&	Bitwise AND operator. Address-of operator.
= ==	Assignment operator. Comparison operator.
<= <<=	Less-than-or-equal-to operator. Compound shift-left assignment operator.
<	Less-than operator. Left delimiter in #include directive.
()	Enclose formal parameters in a function definition. Make a function call. Convert (cast) a value to a different type. Define a macro with arguments. Enclose the operand of the sizeof operator when it is a typename