C语言编程常用头文件(国外英文资料)
C语言编程常用头文件(国外英文资料)
C common header file summary
The serial number library category header file
1 character processing ctype.h
Regionalization of local. H
math.h
4 signal processing signal. H
5 input/output stdio
Utility program stdli.h
7 string processing string.h
Character processing function
This class function is used to handle a single character, including the class tests of characters and the case conversion of characters
The header file ctype. H
Function list < >
The function class function USES detailed instructions
The character test is the letter and the number isalnum
Whether the letter isalpha
Control character iscntrl
Whether digital isdigit
Can display characters (except whitespace) isgraph
Display character (including space) isprint
Is it not a space, not a display character ispunct of letters and Numbers
If the blank space isspace
Is it the capital isupper
Is the hexadecimal number (0-9, a-f) character isxdigit
The character case conversion function is converted to the uppercase toupper
Convert to lowercase tolower
regionalization
The functions of this class are used to handle language differences in different countries.
Header file is local. H
Function list
The function class function USES detailed instructions
Setlocale is set in the area control area
The digital format convention is to query the country's currency, date, time, and other formats to convert localeconv
Mathematical function
This classification is given various mathematical calculation function, must remind is the data format does not conform to the ANSI C standard IEEE754 standard, but some C compilers follow IEEE754 (such as frinklin C51)
The header file math. H
Function list
The function class function USES detailed instructions
Error condition processing domain error (the input parameter value of the function is not within the specified scope)
Range error (the return value of a function is not within the specified scope)
The trig function is the inverse cosine of the acos
Arcsine a
