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Function Details : setbuf

voidsetbuf(FILE * stream,char * buffer) ;

Return Type : void

Type that indicates no return value

Read about return values of setbuf function .

1st Parameter Type : FILE *

Pointer to FILE structure for file operations

1st Parameter

Pointer to the `FILE` stream whose buffering mode is to be set.

2nd Parameter Type : char *

String pointer (array of characters)

2nd Parameter

Pointer to a user-provided buffer for the stream. If `buffer` is `NULL`, the stream will be set to unbuffered mode.

Read more about parameters of setbuf in parameters section

The setbuffunction in C language Sets the buffer to be used by the stream for I/O operations.

The setbuf function is used to associate a buffer with a stream or to disable buffering. If the buffer is NULL, buffering is disabled. Otherwise, the buffer must have a size of at least BUFSIZ bytes, where BUFSIZ is a macro constant defined in <stdio.h>.

The setbuffunction takes 2 parameters:

•
FILE * `stream`: Pointer to the `FILE` stream whose buffering mode is to be set.
•
char * `buffer`: Pointer to a user-provided buffer for the stream. If `buffer` is `NULL`, the stream will be set to unbuffered mode.

Sets the buffering mode for the specified `FILE` stream. If `buffer` is `NULL`, the stream is unbuffered. Otherwise, the stream will use the provided buffer for I/O. The size of the buffer must be at least `BUFSIZ` bytes. This function should be called before any other operations on the stream.

The setbuf function return value :

This function does not return a value

Output

This example demonstrates how to set a custom buffer for a file stream using setbuf.