File processing function

function	description Description
`fopen()`	`open` a new or existing file
`fprintf()`	write data to `file`
`fscanf()`	`read` data from a file
`fputc()`	write a character to `file`
`fgetc()`	`read` a character from a file
`fclose()`	`close` the file
`fseek()`	set the file pointer to `the given position`
`fputw()`	Write an integer `to` a file
`fgetw()`	`read` an integer from a file
`ftell()`	returns the current `position`
`rewind()`	set the file pointer to the beginning of the file
There are many functions in the C library to `open`/`read`/`write`/`search` and `close` files

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