C程序设计语言 -- 运算符优先级

1. 运算符分类

•   算术运算符            【+， -，*， /， % ， ++， --】
•  关系运算符             【>,  >=, <, <=】
•  相等性运算符           [==,  != ]
•  逻辑运算符             【&&， ||】（&& 高于 ||）
•  赋值运算符             【 = 】
•  按位运算符             【&， |， ^】

2. 优先级与结合律

　　( )， [ ], ->, .                                                                从左至右

   　！， ~， ++， --， +， -， *， & （type） sizeof()    从右至左

   　*， /, %                                                                        从左至右

   　+， -                                                                           从左至右

  　<<, >>                                                                          从左至右

  　<, <=, >, >=                                                                  从左至右

 　==， ！=                                                                       从左至右

　&                                                                                   从左至右

　^                                                                                    从左至右

　|　　                                                                             从左至右

　&&　　                                                                         从左至右

　||                                                                                   从左至右

 　?:                                                                                 从右至左

 　=, +=, -=， /=， %=, &=                                              从右至左

　^=, !=, <<=,  >>=                                                          从左至右

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