হেডার ফাইল ও তাদের ফাংশন সমূহ

Header file name: string.h
Functions it contains:

atof
convert a string to floating point
atoi
convert a string to integer
atol
convert a string to long
memchr
locate first occurrence of a character
memcmp
compare two blocks of memory
memcmpp
compare two blocks of memory with padding
memcpy
copy characters
memcpyp
copy characters (with padding)
memfil
fill a block of memory with a multicharacter string
memlwr
translate a memory block to lowercase

memmove
copy characters
memscan
scan a block of memory using a translate table
memscntb
build a translate table for use by memscan
memset
fill a block of memory with a single character
memupr
translate a memory block to uppercase
memxlt
translate a block of memory
stcpm
unanchored pattern match
stcpma
anchored pattern match
strcat
concatenate two null-terminated strings
strchr
locate first occurrence of a character in a string
strcmp
compare two null-terminated strings
strcpy
copy a null-terminated string
strcspn
locate the first occurrence of the first character in a set
strlen
compute length of null-terminated string
strlwr
convert a string from uppercase to lowercase
strncat
concatenate two null-terminated strings (limited)
strncmp
compare portions of two strings
strncpy
copy a limited portion of a null-terminated string
strpbrk
find first occurrence of character of set in string
strrchr
locate the last occurrence of a character in a string
strrcspn
locate the last character in a set
strrspn
locate the last character of a search set not in a given set
strsave
allocate a copy of a character string
strscan
scan a string using a translate table
strscntb
build a translate table for use by strscan
strspn
locate the first occurrence of the first character not in a set
strstr
locate first occurrence of a string within a string
strtod
convert a string to double
strtok
get a token from a string
strtol
convert a string to long integer
strtoul
convert a string to an unsigned long integer
strupr
convert a string from lowercase to uppercase
strxlt
translate a character string
xltable
build character translation table.

Header File name: math.h
Functions it contains:

abs
integer conversion: absolute value
acos
compute the trigonometric arc cosine
asin
compute the trigonometric arc sine
atan
compute the trigonometric arc tangent
atan2
compute the trigonometric arc tangent of a quotient
ceil
round up a floating-point number
cos
compute the trigonometric cosine
cosh
compute the hyperbolic cosine
div
integer conversion: division
erf
compute the error function
erfc
compute the complementary error function
exp
compute the exponential function
fabs
floating-point conversion: absolute value
floor
round down a floating-point number
fmax
find the maximum of two doubles
fmin
find the minimum of two doubles
fmod
floating-point conversion: modules
frexp
floating-point conversion: fraction-exponent split
gamma
compute the logarithm of the gamma function
hypot
compute the hypotenuse function
j0
Bessel function of the first kind, order 0
j1
Bessel function of the first kind, order 1
jn
Bessel function of the first kind, order n
labs
integer conversion: absolute value
ldexp
floating-point conversion: load exponent
_ldexp
fast implementation of ldexp
ldiv
integer conversion: division
log
compute the natural logarithm
log10
compute the common logarithm
_matherr
handle math function error
max
find the maximum of two integers
min
find the minimum of two integers
modf
floating-point conversion: fraction-integer split
pow
compute the value of the power function
rand
simple random number generation
sin
compute the trigonometric sine
sinh
compute the hyperbolic sine
sqrt
compute the square root
srand
simple random number generation
tan
compute the trigonometric tangent
tanh
compute the hyperbolic tangent
y0
Bessel function of the second kind, order 0
y1
Bessel function of the second kind, order 1
yn
Bessel function of the second kind, order n.

 

Header file name: ctype.h
Functions it contains:

isalnum
alphanumeric character test
isalpha
alphabetic character test
isascii
ASCII character test
iscntrl
control character test
iscsym
test for valid C identifier symbol
iscymf
test for valid C identifier initial symbol
isdigit
test for numeric character
isebcdic
EBCDIC character test
isgraph
graphic character test
islower
lowercase alphabetic character test
isprint
printing character test
ispunct
punctuation test
isspace
white space test
isupper
uppercase alphabetic character test
isxdigit
hexadecimal digit test
toebcdic
reduce integer to EBCDIC character
tolower
translate uppercase character to lowercase
toupper
translate lowercase character to uppercase.