1. C syntax (simplified) BNF

2. Program ::= [ ]

3. Directives ::= [ ] ::= | |… ::=#include > ::=#define

4. Functions ::= [ ] ::= ::= ::=

5. Functions ::= ([ ]) ::= [, ] ::= |

6. Statements ::= [ ] ::= ; | ::= |return |break |continue |goto

7. Statements ::= { [declarations][ ] }

8. Declarations ::= [ ] ::= ; | ; ::= [= ]>[, ] ::= = [ ] ::= [ ] [[ ]…][={,…}]

9. Data types ::= [unsigned] [short|long] int | char | float | double

10. Identifiers ::= [ ] ::=_|A|B|…|z = [ ] = |

11. Expressions ::= | |& |…

12. Expressions |( ) | | | | ::= ? :

13. Arithmetic expressions ::= | ::=+|- ::=+|-|*|/|%

14. Relational Expression ::= ::= | =|==|!= ::= ! | && | ||

15. Assignments ::= ::= | [ ]… ::= =|+=|-=|*=|/=|%=

16. Increment/Decrement ::= | ::=++ ::= | ::=--

17. Decision Statements ::= | ::= if ( ) [else ]

18. Switch statement ::= switch ( ) { case : … [default: statements] }

19. Loop statements ::= while ( ) |do while (expression) |for ( ; ; )

20. Function calls ::= ::= ([ ]) :: = [, ]

21. Constants ::= | ::=[-]digits[.digits] ::= [ ] ::=0|1|…|9 ::=“ ” ::= ::=A|B|…|z|0|…|9|(|)|!| |.|*|…