Operator precedence
                
More precedence

LR	( ) [ ] -> . x++ x--
RL	! ~ - + ++x --x * & sizeof (type)
LR	* / %
LR	+ -
LR	<< >>
LR	< <= > >=
LR	== !=
LR	&
LR	^
LR	|
LR	&&
LR	||
RL	? :
RL	= += -= *= /= %= >>= <<= &= ^= |=
LR	,

Less precedence


Function definition

type function_name(int a, float b, const char * ch,...) { function_body }

/* only parameters passed by address can are modified*/ 

/* in the calling function, local copy can be modified*/

char * strcpy( char * s1, const char * s2 ) { statements }

Declarations forms

basic_type variable;

type variable[val][val]...[val]={data,data,...};  /*multidimensional array*/

struct struct_name {     /* struct_name is optional */
     type variable_1;    /* any declaration */
     …                   /* all variable names must be unique*/
} variable_1, ... ;      /* variables are optional */

struct struct_name {          /* struct_name is optional */
     type variable_1: length; /* any declaration : length in bits */
         ...					        /* type is int, unsigned or signed */
} variable_1, ... ;           /* variables are optional, they can also be arrays and pointers */


union union_name {            /* union_name is optional */
    type variable_1;          /* variable_1 overlays variable_2 */
    type variable_2;
        ...
} variable_a, ...;            /* variables are optional */

enum enum_type                /* enum_name is optional */
  { enumeration_name_1,       /* establishes enumeration literals */
    enumeration_name_2=number,/* optional number, */
      ...                     /* default is 0, 1, 2, ... */
  } variable, ...;            /* variables are optional */

 /* use dot notation to select a component of a struct or union */