I>stdlib.h - contains the following functions.

<P>
atoi, atol.

<P>
 </LI>
<LI>string.h - contains the following functions.

<P>
strcpy, strncpy, strcat, strncat, strcmp, strncmp, strchr, strrchr,
strspn, strcspn, strpbrk, strstr, strlen, strtok, memcpy, memcmp,
memset.

<P>
 </LI>
<LI>ctype.h - contains the following routines.

<P>
iscntrl, isdigit, isgraph, islower, isupper, isprint, ispunct, isspace,
isxdigit, isalnum, isalpha.

<P>
 </LI>
<LI>malloc.h - The malloc routines are developed by Dmitry S. Ob