数据类型13个：
void signed unsigned short long
int float double char
enum struct union typedef
类型限定、修饰2个：
const volatile
(restrict inline)
变量储存类别4个：
auto static extern register
运算符1个：
sizeof
控制12个：
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for
重复
void signed unsigned short long
int float double char
enum struct union typedef
const volatile restrict inline
auto static extern register
sizeof
goto return break
continue if else
switch case default
do while for