atof
atoi
atol
atoll
strtol
strtoul
strtoll
strtoull
strtod
strtof
qsort
bsearch
snprintf
sscanf
memmove
memchr
strncmp
strncpy
strchr
strrchr
strstr
isalnum
isalpha
isblank
iscntrl
isdigit
isgraph
islower
isprint
ispunct
isspace
isupper
isxdigit
tolower
toupper