c语言中符号含义（Symbolic meaning in C language）.docVIP

c语言中符号含义（Symbolic meaning in C language） Char Meaning: defines a character type variable or a return value Usage: define (declare) a character variable or return value Structure: the type specifier (a total of two kinds of modified variables and functions) Char does not define the variable name; Char function name ([parameter table]) {function body} Cases: Char a; Char asd; Char x= a; - - - - - - - - - -- Float Definition: a decimal variable or a return value (Dan Jingdu) Usage: define (declare) a decimal variable or a return value Structure: defining structures (two kinds of variables and functions, respectively) Float does not define the variable name; Float function name ([parameter table]) {function body} Cases: Float a; Float asd; Float x=1.74; - - - - - - - - - -- Double Definition: a decimal variable or a return value (double precision) Usage: define (declare) a decimal variable or a return value Structure: the type specifier (a total of two kinds of modified variables and functions) The double specifier is not defined; Double function name ([parameter table]) {function body} Cases: Double a; Double asd; Double x=1.74; - - - - - - - - - -- Int Definition: integer type variable or return value Usage: define (declare) an integer variable or a return value Structure: defining structures (two kinds of variables and functions, respectively) Int does not define the variable name; Int function name ([parameter table]) {function body} Cases: Int a; Int asd; Int x=2; - - - - - - - - - -- Long, short, unsigned, signed Definition: long, short, long, short, and unsigned Usage: put in front of int, modify int (also save int direct write), can be written in combination form Structure: a modified definition (two kinds of variables and functions, respectively) [long/short] [unsigned/signed] [int] does not define the variable name; [long/short] [unsigned/signed] [int] function name ([parameter table]) {function body} Cases: Long int a; short a; unsigned a; signed int a; Long