1 The C Programming language Chapter 1 An Overview of C 32 keywords:(由系统定义,不能重作其它定义) auto break case char const continue default do double else enum extern float for goto if int long register return 682 short signed sizeof static struct switch typedef unsigned union void volatile while32 keywords ：(由系统定义，不能重作其它定义) auto break case char const continue default do double else enum extern float for goto if int long register return short signed sizeof static struct switch typedef unsigned union void volatile while < The C Programming Language Chapter 1 An Overview of C