clearerr, fclose, feof, ferror, fflush, fgetc, fgetpos, fgets, fopen, fprintf, fputc, fputs, fread, freopen, fscanf, fseek, fsetpos, ftell, fwrite, getc, getchar, gets, perror, printf, putc, putchar, puts, remove, rename, rewind, scanf, setbuf, setvbuf, sprintf, sscanf, tmpfile, tmpnam, vfprintf, ungetc, vprintf, vsprintf,

memchr, memcmp, memcpy, memmove, memset, strcat, strchr, strcmp, strcoll, strcpy, strcspn, strerror, strlen, strncat, strncmp, strncpy, strpbrk, strrchr, strspn, strstr, strtok, strxfrm

abort, abs, assert, atexit, atof, atoi, atol, bsearch, calloc, div, exit, free, getenv, labs, ldiv, longjmp, malloc, mblen, mbstowcs, mbtowc, qsort, rand, realloc, setjmp, srand, strtod, strtol, strtoul, system, wcstombs, wctomb

asctime, gmtime, localtime, time, clock, ctime, difftime, mktime, strftime

raise, signal

isalnum, isalpha, iscntrl, isdigit, isgraph, islower, isprint, ispunct, isspace, isupper, isxdigit, tolower, toupper

acos, asin, atan, atan2, ceil, cos, cosh, exp, fabs, floor, fmod, frexp, ldexp, log, log10, modf, pow, sin, sinh, sqrt, tan, tanh

localeconv, setlocale, va_arg, va_end, va_start