Standard Functions

This section describes all the standard functions in the ANSI-C library. Each function description contains the subsections listed in the following table.

The functions listed in this section also include some functions which are not implemented in the Compiler. These unimplemented functions are categorized as:

• Hardware specific
• File I/O

• abort()
  
• abs()
  
• acos() and acosf()
  
• asctime()
  
• asin() and asinf()
  
• assert()
  
• atan() and atanf()
  
• atan2() and atan2f()
  
• atexit()
  
• atof()
  
• atoi()
  
• atol()
  
• bsearch()
  
• calloc()
  
• ceil() and ceilf()
  
• clearerr()
  
• clock()
  
• cos() and cosf()
  
• cosh() and coshf()
  
• ctime()
  
• difftime()
  
• div()
  
• exit()
  
• exp() and expf()
  
• fabs() and fabsf()
  
• fclose()
  
• feof()
  
• ferror()
  
• fflush()
  
• fgetc()
  
• fgetpos()
  
• fgets()
  
• floor() and floorf()
  
• fmod() and fmodf()
  
• fopen()
  
• fprintf()
  
• fputc()
  
• fputs()
  
• fread()
  
• free()
  
• freopen()
  
• frexp() and frexpf()
  
• fscanf()
  
• fseek()
  
• fsetpos()
  
• ftell()
  
• fwrite()
  
• getc()
  
• getchar()
  
• getenv()
  
• gets()
  
• gmtime()
  
• isalnum(), isalpha(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(), and isxdigit()
  
• labs()
  
• ldexp() and ldexpf()
  
• ldiv()
  
• localeconv()
  
• localtime()
  
• log() and logf()
  
• log10() and log10f()
  
• longjmp()
  
• malloc()
  
• mblen()
  
• mbstowcs()
  
• mbtowc()
  
• memchr()
  
• memcmp()
  
• memcpy() and memmove()
  
• memset()
  
• mktime()
  
• modf() and modff()
  
• perror()
  
• pow() and powf()
  
• printf()
  
• putc()
  
• putchar()
  
• puts()
  
• qsort()
  
• raise()
  
• rand()
  
• realloc()
  
• remove()
  
• rename()
  
• rewind()
  
• scanf()
  
• setbuf()
  
• setjmp()
  
• setlocale()
  
• setvbuf()
  
• signal()
  
• sin() and sinf()
  
• sinh() and sinhf()
  
• sprintf()
  
• sqrt() and sqrtf()
  
• srand()
  
• sscanf()
  
• strcat()
  
• strchr()
  
• strcmp()
  
• strcoll()
  
• strcpy()
  
• strcspn()
  
• strerror()
  
• strftime()
  
• strlen()
  
• strncat()
  
• strncmp()
  
• strncpy()
  
• strpbrk()
  
• strrchr()
  
• strspn()
  
• strstr()
  
• strtod()
  
• strtok()
  
• strtol()
  
• strtoul()
  
• strxfrm()
  
• system()
  
• tan() and tanf()
  
• tanh() and tanhf()
  
• time()
  
• tmpfile()
  
• tmpnam()
  
• tolower()
  
• toupper()
  
• ungetc()
  
• va_arg(), va_end(), and va_start()
  
• vfprintf(), vprintf(), and vsprintf()
  
• wctomb()
  
• wcstombs()