Standard C libraries used by SHYSTER

math

• fabs: returns the absolute value of its argument;
• floor: returns the greatest integral value less than or equal to its argument; and
• sqrt: returns the square root of its argument.

stdio

• EOF: a constant returned upon reaching the end of a file;
• fclose: causes any buffered data waiting to be written for the given stream to be written out, and the stream to be closed;
• FILE: a defined type for streams;
• fopen: opens a given file, associates a stream with it, and returns a pointer to the file structure associated with that stream;
• fprintf: places output on a given stream;
• fscanf: reads from a given stream;
• getc: returns the next character from a given input stream;
• gets: reads characters from the standard input stream into a string;
• NULL: a constant which designates a null pointer;
• sprintf: places output, followed by the null character, in consecutive bytes of a string;
• stderr: the standard error stream;
• stdin: the standard input stream;
• stdout: the standard output stream; and
• ungetc: pushes a character back onto a given input stream.

stdlib

• exit: closes any open files and terminates program execution;
• EXIT_FAILURE: a constant returned to the operating system to indicate that the program has terminated unsuccessfully;
• EXIT_SUCCESS: a constant returned to the operating system to indicate that the program has terminated successfully;
• free: frees storage earlier allocated;
• malloc: allocates storage; and
• realloc: reallocates storage.

string

• strchr: returns a pointer to the first occurrence of a given character in a given string, or a null pointer if it does not occur; and
• strcmp: returns zero if two given strings are identical.