C Language Grammar

C Language Program--〉main function, call database | function declaration | function definition

Main function--〉 function definition variable | calling function

function declaration--〉 function name, argument, type

Defining a variable--〉 function type

Type--〉void| char| Int| FLOAT

Defining--〉 Defining Variables | calling functions

Parameter--〉 argument type, parameter name

Declaration → Pointer Direct declaration | Direct declaration

Pointer →* | * pointer

Direct Declaration → identifiers | Direct declaration []| Direct declaration [constant Expression]| Identifiers (parameter list) | Identifier () | (Direct declaration, List of identifiers)

Identifier list → identifiers | (identifier list, identifier)

Constant-expression → conditional-expression

parameter list → parameter declaration | (parameter list, parameter declaration)

parameter declaration → Descriptor declaration, identifier

Compound Statement →{} | {Statement List} | {Declaring list statement list}

Declaration List → Declaration | Declaration List Declaration

Declaration → Initialization Declaration | (Initialize declaration list, initialize declaration)

Declaration of initialization → Declaration | Declaration = Initialization Program

Initialization program → expression | {initialization Program List} | {Initialization program list,}

Initialization program list → initialization Program | (Initialize program list, initialize program)

Statement List → statements | Statement list

Statement → statement | Compound Statement | Expression Statements | SELECT statement | Loop Statement | JUMP statement

expression statement → expression;

SELECT statement →if (expression) statement | IF (expression) statement | ELSE statement

Loop statement →while (expression) statement | For (an expression statement; An expression statement) | For (an expression statement; An expression statement; An expression statement)

Jump Statement | continue; |breack; | return; | return expression;

Expression → assignment expression | (An expression, an assignment expression)

assignment expression → conditional expression | unary expression (Assignment operator) assignment expression

conditional expression → logical ' or ' expression | logical ' or ' expression? Expression: Conditional expression

Logical ' or ' expression → logic ' and ' expression | logic ' or ' expression ' or ' operation | logic ' and ' expression

Logic ' and ' expression '-logic ' or ' expression | logic ' with ' expression ' and ' operation (logical ' or ' expression ')

or op-expression → xor expression | or expression ' | xor expression

equality expressions → relational expressions | Equality expression equals an expression of an operation relationship | An equality expression is not equal to an expression of an operation relationship

Relationship expression → substitution expression | relationship expression Substitution expression | Relationship expression Substitution expression | Relational expression <= Substitution expression | < relationship expression >= substitution expression

Replace expression → addition expression | Subtraction-expression | Multiplication expressions

addition expression → multiplication expression >| (addition expression + multiplication expression) | (addition expression-multiplication expression)

multiplication expression → cast expression | (Multiplication expression * Cast expression) | (multiplication expression/cast expression) | (multiplicative expression% cast expression)

Basic Expressions → identifiers | Constants | string | (expression)

Unary operator →& | * | + |- | ~ | !

Assignment operator →=| Multiply Assign values | Division Assignment | finding remainder Assignment | addition Assignment | subtraction Assignment | Left Assignment | Right Assignment | and Assignment | XOR Assignment | or assignment

Storage class Descriptor →typedef (definition Type) | <extern (external variable) | <static (Static) | Auto (Auto) | Register (Register)

Specifiers qualifier list → type specifier specifier qualifier list | Type descriptor | Type Qualifier Descriptor Qualifier List | Type qualifier

Tag statement → (identifier: statement) | Case (constant expression: statement) | Default (statement)

C Language Grammar