C Language Grammar

Program--source program | Start < file header >|< function > End

source program → External declarations | Sub-Program (external Declaration)

File Header--functions

Function---Library function | function Body | user-defined function

Library functions, #include <stdio.h>| #define ...

function body, function definition | function declaration | Statement string | SELECT structure

function definition → function type (compound sentence) | variable

Variable--Identifier

Identifiers-Letters | numerals | underline

English letter with capital Letter | lowercase English Letter

User-defined function type | function name |

Type of function, data type

Data type, Basic type | Construction type | pointer type | no type

Basic Type-integer | real (Floating-point) | character | enum type

Integral type--signed integer | unsigned integer | Long integer type | unsigned long

Real types-Different forms of real type

Different forms of real type--Decimal decimal form | exponential form

Different types of real, single-precision real | Double Precision | Long double precision REAL type

Character type

enum-type

Constructed type-array | struct | shared body

Array--numeric array | character array

Array of values, one-dimensional arrays | two-dimensional arrays | multidimensional arrays

Character array-string | array of strings

Pointer type, function pointer | array pointer | string Pointers | Pointer to pointer

Function name->cxp| ...

Simple screen output-string | Variable value by specified format | data type

Assignment operator, assign-value-operand |

Simple operator, assignment operator | compound operator

Simple operator, multiplication (*) | Division (/) | redundancy (%) | addition (+) | subtraction (-)

Compound operator->+=|-=|*=|/=|%=

Operands, constants | variables | functions

Statement string, loop statement | array | pointer | data type | number | struct | Select Structure | variable | constant | operator | symbol | keyword | character

Loop Statement->for|switch|do-while|while

Select structure, single branch structure | Branch Structure | multi-branch Structure | nested structure

C Language Grammar