本文共 1016 字，大约阅读时间需要 3 分钟。
| Symbol | Meaning |
| static | Inside a function, retains its value between calls At the function level, visible only in 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 a 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 Provide expression precedence Convert (cast) a value to a different type Define a macro with arguments Make a macro call with arguments Enclose the operand of the sizeof operator when it is a typename |
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