1  auto  
2  break  
3  case  
4  char  
5  const  
6  continue  
7  default  
8  do  
9  double  
10  else  
11  enum  
12  extern  
13  float  
14  for  
15  goto  
16  if  
17  int  
18  long  
19  register  
20  return  
21  short  
22  sizeof  
23  static  
24  struct  
25  switch  
26  typedef  
27  union  
28  unsigned  
29  void  
30  volatile  
31  while  
32  (null)