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  • Publicado : 5 de setembro de 2012
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C Reference Card (ANSI)
Program Structure/Functions
type fnc (type 1 ,. . . )
type name
main() {
declarations
statements
}
type fnc (arg 1 ,. . . ) {
declarations
statements
return value ;}
/* */
main(int argc, char *argv[])
exit(arg )

function declarations
external variable declarations
main routine
local variable declarations
function definition
local variabledeclarations

Constants

Flow of Control

long (suffix)
float (suffix)
exponential form
octal (prefix zero)
hexadecimal (prefix zero-ex)
character constant (char, octal, hex)
newline, cr, tab, backspacespecial characters
string constant (ends with '\0')

L or l
F or f
e
0
0x or 0X
'a', '\ooo ', '\xhh '
\n, \r, \t, \b
\\, \?, \', \"
"abc. . . de"

Pointers, Arrays & Structures

includelibrary file
#include
include user file
#include "filename "
replacement text
#define name text
replacement macro
#define name (var ) text
Example . #define max(A,B) ((A)>(B) ? (A) : (B))undefine
#undef name
quoted string in replace
#
concatenate args and rescan
##
conditional execution
#if, #else, #elif, #endif
is name defined, not defined?
#ifdef, #ifndef
name defined?
defined(name )line continuation char
\

declare pointer to type
type *name
declare function returning pointer to type type *f()
declare pointer to function returning type type (*pf)()
generic pointer typevoid *
null pointer
NULL
object pointed to by pointer
*pointer
address of object name
&name
array
name [dim ]
multi-dim array
name [dim 1 ][dim 2 ]. . .
Structures
struct tag {
structuretemplate
declarations
declaration of members
};
create structure
struct tag name
member of structure from template
name .member
member of pointed to structure
pointer -> member
Example .(*p).x and p->x are the same
single value, multiple type structure
union
bit field with b bits
member : b

Data Types/Declarations

Operators (grouped by precedence)

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