ALL READING AND WRITING OF DATA up to this point has been done through your terminal.[1] When you wanted to input some information, you either used the scanf or getchar functions. All program results were displayed in your window with a call to the printf function.
The C language itself does not have any special statements for performing input/output (I/O) operations; all I/O operations in C must be carried out through function calls. These functions are contained in the standard C library.
Recall the use of the following include statement from previous programs that used the printf function:
#include <stdio.h>
This include file contains function declarations and macro definitions associated with the I/O ...
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