<stdio.h>

The <stdio.h> include file defines constants, macros, and types, and declares stream input and output functions. The stream I/O functions are:

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

In extended mode, <stdio.h> also defines the following extensions:

_fcloseall _fgetchar
fileno _flushall
_fputchar _rmtmp
_set_crt_msg_handle tempnam
unlink  

<stdio.h> also defines the macros listed below. You can use these constants in your programs, but you should not alter their values.

BUFSIZ Specifies the buffer size to be used by the setbuf library function when you are allocating buffers for stream I/O. This value establishes the size of system-allocated buffers and is used with setbuf.
EOF The value returned by an I/O function when the end of the file (or in some cases, an error) is found.
FOPEN_MAX The number of files that can be opened simultaneously.
FILENAME_MAX The longest file name supported. If there is no reasonable limit, FILENAME_MAX will be the recommended size.
L_tmpnam The size of the longest temporary name that can be generated by the tmpnam function.
P_tmpdir Indicates the default directory to be used by the tempnam function.
TMP_MAX The minimum number of unique file names that can be generated by the tmpnam function.
NULL A pointer guaranteed not to point to a data object. NULL is also defined in <locale.h>.

The FILE structure type is defined in <stdio.h>. Stream I/O functions use a pointer to the FILE type to get access to a given stream. The system uses the information in the FILE structure to maintain the stream.

The C standard streams stdin, stdout, and stderr are also defined in <stdio.h>.

The macros SEEK_CUR, SEEK_END, and SEEK_SET expand to integral constant expressions and can be used as the third argument to fseek.

The macros _IOFBF, _IOLBF, and _IONBF expand to integral constant expressions with distinct values suitable for use as the third argument to the setvbuf function.

The type fpos_t is defined in <stdio.h> for use with fgetpos and fsetpos.



<locale.h>
<stddef.h>
<stdlib.h>
<conio.h>
<io.h>
#include