Standard C I/O

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clearerr	clears errors
fclose	close a file
feof	true if at the end-of-file
ferror	checks for a file error
fflush	writes the contents of the output buffer
fgetc	get a character from a stream
fgetpos	get the file position indicator
fgets	get a string of characters from a stream
fopen	open a file
fprintf	print formatted output to a file
fputc	write a character to a file
fputs	write a string to a file
fread	read from a file
freopen	open an existing stream with a different name
fscanf	read formatted input from a file
fseek	move to a specific location in a file
fsetpos	move to a specific location in a file
ftell	returns the current file position indicator
fwrite	write to a file
getc	read a character from a file
getchar	read a character from stdin
gets	read a string from stdin
perror	displays a string version of the current error to stderr
printf	write formatted output to stdout
putc	write a character to a stream
putchar	write a character to stdout
puts	write a string to stdout
remove	erase a file
rename	rename a file
rewind	move the file position indicator to the beginning of a file
scanf	read formatted input from stdin
setbuf	set the buffer for a specific stream
setvbuf	set the buffer and size for a specific stream
sprintf	write formatted output to a buffer
sscanf	read formatted input from a buffer
tmpfile	return a pointer to a temporary file
tmpnam	return a unique filename
ungetc	puts a character back into a stream
vprintf, vfprintf, and vsprintf	write formatted output with variable argument lists