====== All C Functions ======
|[[preprocessor/sharp]]|manipulate strings|
|[[preprocessor/define]]|define variables|
|[[preprocessor/error]]|display an error message|
|[[preprocessor/preprocessor_if|#if, #ifdef, #ifndef, #else, #elif, #endif]]|conditional operators|
|[[preprocessor/include]]|insert the contents of another file|
|[[preprocessor/line]]|set line and file information|
|[[preprocessor/pragma]]|implementation specific command|
|[[preprocessor/undef]]|used to undefine variables|
|[[preprocessor/preprocessor_vars]]|miscellaneous preprocessor variables|
|[[c/other/abort]] |stops the program|
|[[c/math/abs]] |absolute value|
|[[c/math/acos]] |arc cosine|
|[[c/date/asctime]] |a textual version of the time|
|[[c/math/asin]] |arc sine|
|[[c/other/assert]] |stops the program if an expression isn't true|
|[[c/math/atan]] |arc tangent|
|[[c/math/atan2]] |arc tangent, using signs to determine quadrants|
|[[c/other/atexit]] |sets a function to be called when the program exits|
|[[c/string/atof]] |converts a string to a double|
|[[c/string/atoi]] |converts a string to an integer|
|[[c/string/atol]] |converts a string to a long|
|[[c/other/bsearch]] |perform a binary search|
|[[c/mem/calloc]] |allocates and clears a chunk of memory|
|[[c/math/ceil]] |the smallest integer not less than a certain value|
|[[c/io/clearerr]] |clears errors|
|[[c/date/clock]] |returns the amount of time that the program has been running|
|[[c/math/cos]] |cosine|
|[[c/math/cosh]] |hyperbolic cosine|
|[[c/date/ctime]] |returns a specifically formatted version of the time|
|[[c/date/difftime]] |the difference between two times|
|[[c/math/div]] |returns the quotient and remainder of a division|
|[[c/other/exit]] |stop the program|
|[[c/math/exp]] |returns "e" raised to a given power|
|[[c/math/fabs]] |absolute value for floating-point numbers|
|[[c/io/fclose]] |close a file|
|[[c/io/feof]] |true if at the end-of-file|
|[[c/io/ferror]] |checks for a file error|
|[[c/io/fflush]] |writes the contents of the output buffer|
|[[c/io/fgetc]] |get a character from a stream|
|[[c/io/fgetpos]] |get the file position indicator|
|[[c/io/fgets]] |get a string of characters from a stream|
|[[c/math/floor]] |returns the largest integer not greater than a given value|
|[[c/math/fmod]] |returns the remainder of a division|
|[[c/io/fopen]] |open a file|
|[[c/io/fprintf]] |print formatted output to a file|
|[[c/io/fputc]] |write a character to a file|
|[[c/io/fputs]] |write a string to a file|
|[[c/io/fread]] |read from a file|
|[[c/mem/free]] |returns previously allocated memory to the operating system|
|[[c/io/freopen]] |open an existing stream with a different name|
|[[c/math/frexp]] |decomposes a number into scientific notation|
|[[c/io/fscanf]] |read formatted input from a file|
|[[c/io/fseek]] |move to a specific location in a file|
|[[c/io/fsetpos]] |move to a specific location in a file|
|[[c/io/ftell]] |returns the current file position indicator|
|[[c/io/fwrite]] |write to a file|
|[[c/io/getc]] |read a character from a file|
|[[c/io/getchar]] |read a character from STDIN|
|[[c/other/getenv]] |get enviornment information about a variable|
|[[c/io/gets]] |read a string from STDIN|
|[[/c/date/gmtime]] |returns a pointer to the current Greenwich Mean Time|
|[[c/string/isalnum]] |true if a character is alphanumeric|
|[[c/string/isalpha]] |true if a character is alphabetic|
|[[c/string/iscntrl]] |true if a character is a control character|
|[[c/string/isdigit]] |true if a character is a digit|
|[[c/string/isgraph]] |true if a character is a graphical character|
|[[c/string/islower]] |true if a character is lowercase|
|[[c/string/isprint]] |true if a character is a printing character|
|[[c/string/ispunct]] |true if a character is punctuation|
|[[c/string/isspace]] |true if a character is a space character|
|[[c/string/isupper]] |true if a character is an uppercase character|
|[[c/string/isxdigit]] |true if a character is a hexidecimal character|
|[[c/math/labs]] |absolute value for long integers|
|[[c/math/ldexp]] |computes a number in scientific notation|
|[[c/math/ldiv]] |returns the quotient and remainder of a division, in long integer form|
|[[c/date/localtime]] |returns a pointer to the current time|
|[[c/math/log]] |natural logarithm|
|[[c/math/log10]] |natural logarithm, in base 10|
|[[c/other/longjmp]] |start execution at a certain point in the program|
|[[c/mem/malloc]] |allocates memory|
|[[c/string/memchr]] |searches an array for the first occurance of a character|
|[[c/string/memcmp]] |compares two buffers|
|[[c/string/memcpy]] |copies one buffer to another|
|[[c/string/memmove]] |moves one buffer to another|
|[[c/string/memset]] |fills a buffer with a character|
|[[c/date/mktime]] |returns the calendar version of a given time|
|[[c/math/modf]] |decomposes a number into integer and fractional parts|
|[[c/io/perror]] |displays a string version of the current error to STDERR|
|[[c/math/pow]] |returns a given number raised to another number|
|[[c/io/printf]] |write formatted output to STDOUT|
|[[c/io/putc]] |write a character to a stream|
|[[c/io/putchar]] |write a character to STDOUT|
|[[c/other/putenv]] |add/modify the environmental settings|
|[[c/io/puts]] |write a string to STDOUT|
|[[c/other/qsort]] |perform a quicksort|
|[[c/other/raise]] |send a signal to the program|
|[[c/other/rand]] |returns a pseudorandom number|
|[[c/mem/realloc]] |changes the size of previously allocated memory|
|[[c/io/remove]] |erase a file|
|[[c/io/rename]] |rename a file|
|[[c/io/rewind]] |move the file position indicator to the beginning of a file|
|[[c/io/scanf]] |read formatted input from STDIN|
|[[c/io/setbuf]] |set the buffer for a specific stream|
|[[c/other/setjmp]] |set execution to start at a certain point|
|[[c/date/setlocale]] |sets the current locale|
|[[c/io/setvbuf]] |set the buffer and size for a specific stream|
|[[c/other/signal]] |register a function as a signal handler|
|[[c/math/sin]] |sine|
|[[c/math/sinh]] |hyperbolic sine|
|[[c/io/sprintf]] |write formatted output to a buffer|
|[[c/math/sqrt]] |square root|
|[[c/other/srand]] |initialize the random number generator|
|[[c/io/sscanf]] |read formatted input from a buffer|
|[[c/string/strcat]] |concatenates two strings|
|[[c/string/strchr]] |finds the first occurance of a character in a string|
|[[c/string/strcmp]] |compares two strings|
|[[c/string/strcoll]] |compares two strings in accordance to the current locale|
|[[c/string/strcpy]] |copies one string to another|
|[[c/string/strcspn]] |searches one string for any characters in another|
|[[c/string/strerror]] |returns a text version of a given error code|
|[[c/date/strftime]] |returns individual elements of the date and time|
|[[c/string/strlen]] |returns the length of a given string|
|[[c/string/strncat]] |concatenates a certain amount of characters of two strings|
|[[c/string/strncmp]] |compares a certain amount of characters of two strings|
|[[c/string/strncpy]] |copies a certain amount of characters from one string to another|
|[[c/string/strpbrk]] |finds the first location of any character in one string, in another string|
|[[c/string/strrchr]] |finds the last occurance of a character in a string|
|[[c/string/strspn]] |returns the length of a substring of characters of a string|
|[[c/string/strstr]] |finds the first occurance of a substring of characters|
|[[c/string/strtod]] |converts a string to a double|
|[[c/string/strtok]] |finds the next token in a string|
|[[c/string/strtol]] |converts a string to a long|
|[[c/string/strtoul]] |converts a string to an unsigned long|
|[[c/string/strxfrm]] |converts a substring so that it can be used by string comparison functions|
|[[c/other/system]] |perform a system call|
|[[c/math/tan]] |tangent|
|[[c/math/tanh]] |hyperbolic tangent|
|[[c/date/time]] |returns the current calendar time of the system|
|[[c/io/tmpfile]] |return a pointer to a temporary file|
|[[c/io/tmpnam]] |return a unique filename|
|[[c/string/tolower]] |converts a character to lowercase|
|[[c/string/toupper]] |converts a character to uppercase|
|[[c/io/ungetc]] |puts a character back into a stream|
|[[c/other/va_arg]] |use variable length parameter lists|
|[[c/io/vprintf_vfprintf_vsprintf]] |write formatted output with variable argument lists|
|[[c/io/vscanf_vfscanf_vsscanf]] |gets formatted input from stdin with variable argument lists|