1014 C language Grammar definition and the derivation process of C program

< source programs >→< External declarations > | < source programs > < external declarations >

< external declarations >→< defining functions > |< declarations >

< defining functions >→< Type specifiers > < declarators > < compound statements >

< type specifier >→< no return type > | < character type > | < integral type > | < floating-point >

< declarators > < pointers > < direct declarators > | < direct declarators >

< pointers >→< ' * ' > | < ' * ' pointers >

< direct declarators > < identifiers > | < Direct statement >[]| < Direct declaration ><[constant Expression]> | < identifiers > (parametric tables) | < identifiers > () | < direct declarations >,< identifiers list >

< identifier list >:< identifiers > | < identifier list >,< identifiers >

< constant expressions >→< conditional expressions >

< parameter list >→< parameter declaration > | < parameter list >,< parameter declaration >

< parameter declarations >→< descriptor declarations >< identifiers >

< compound statement >→{} |   {Statement List} | {Declaring statement list}

< declarations list >→< declarations > | < declarations list >< declarations >

< declarations >→< initialization declarations > |< Initialization Declaration list >,< Initialization declarations >

< initialization declarations >→< Declarations > | < declarations >=< initialization programs >

< initialization programs >→< Assignment Expressions > | {Initialize List} | {Initialize list,}

< initialization list >→< initialization program > |< initialization List >,< initialization program >

< statement list >→< Statement > | < statement list >< statements >

< statements >→< Compound statements > |< expression Statements > | < conditional statements > | < looping statements > | < jump statements >

< expression statements >→; | < expression >;

< conditional statement >:if (expression) {statement} | If ' (expression) {statement} else{statement}

< loop statement >→where (expression) {statement} | For (expression statement expression statement) {statement} | For (expression statement expression statement) {statement}

< jump statements > |  Continue; |  Break  |  Return | return expression;

< expressions >:< Assignment Expressions > | < expressions >,< Assignment Expressions >

< Assignment expressions >→< conditional Expressions > | < unary expressions >< assignment operators >< Assignment Expressions >

< conditional expression >→< logical OR expression >|< logical or expression >?< expression >:< conditional expression >

< logic or expression >→< logic and expression > | < logical OR expression > < or op-logical expressions >

< logic and expression >:< or expression > | < logical expressions >< and operations or expressions >

< or arithmetic expressions >→< xor expressions > |< or expression > | | < XOR expressions >

< XOR expressions >:< and Expressions > | < XOR expressions >^< and Expressions >

< expressions >:< Equality Expressions > | < expressions >&< Equality expressions >

< equality expressions >:< Relationship Expressions > | < equality Expressions > = < relational expressions >| < equality expressions >! = < Relationship expressions >

< relationship expressions >:,< substitution Expressions > | < relationship expressions > < < replace expressions > |  < relationship expressions > > < shift expressions > | < relationship expressions > <= < substitution expressions >| < relationship expressions > >= < substitution expressions >

< replace expressions >:< addition Expressions > | < replace expression >< left >< add expression > |< substitution expression >< right >< add expression >

< addition expressions >:< multiplication expressions > |< addition Expressions >+< multiplicative expressions > |< addition Expressions >-< multiplication expressions >

< multiplication expressions >:< cast expressions > |< multiplication Expressions >*< cast expressions > |< multiplication Expressions >/< cast Expressions > | < multiplication expressions >%< cast expressions >

< cast expressions >:< unary expressions > | (type name) < cast expression >

< unary expressions >:< postfix expressions > |< inc Operations >< unary expressions > | <dec Operations >< unary expressions > |< unary Operators >< cast Expressions > | < struct variables >< unary expressions > | < struct variables > (type name)

< postfix expression >:< basic expression > |< suffix expression >[expression] |< suffix expression > () |< suffix expression > (argument expression list) |< suffix expression >.< identifier > | < postfix expressions >*< identifiers > |< suffix expressions ><inc Operations > | < Postfix expressions ><dec operations >

< basic expressions >→< Identifiers > | < Constants > |  < string Constants > | (expression)

< parameter expression list;: < Assignment expression > |< parameter expression List < Assignment expression >

< unary operator;: & | *  |  +  |  -  | ~ |!

< Assignment operator >→= | < multiplication distribution > | < Division allocation > | <mod Distribution > | < addition allocation > | < Sub Assignment > | < left Assignment > | < right Assignment > | < and distribution > | < XOR assign > |< or Assign >

< storage class Descriptor >→< definition type >| < external variables > | < static > | < auto > |< register >

< struct or common body specifier >:< struct or common body >< identifier >{struct declaration list} |< struct or common body >{struct Declaration list} | < struct or common body >< identifiers >

< structure or common body >:< structure > | < shared body >

< struct declaration list >:< struct declaration > | < struct declaration list >< struct declaration >

< struct declaration >:< specifier qualifier List >< struct description list characters >; specifier qualifier list →< type specifier >< descriptor qualifier List > | < type specifier > |< type qualifier >< specifier qualifier list > |< type qualifier >

< struct description list characters >→< struct declaration > | < struct description list characters >,< struct declaration >

1014 C language Grammar definition and the derivation process of C program