基本标识符答:标识数据类型:float,int,long,short,char,double,signed,unsigned,struct,union,enum,volatile,const,typedef.标识流程控制: break,continue,else,for,return,goto,switch,void,while,do,case,default,if.标识储存类型:auto,static,extern,register.标识运算符:sizeof.二. 预定义标识符 除关键字外...