C Programming in easy steps by McGrath Mike

Author:McGrath, Mike
Language: eng
Format: epub
ISBN: 9781840788457
Publisher: In Easy Steps Limited
Published: 2018-11-02T00:00:00+00:00

The program file and custom header file must be located in the same directory but are compiled with the usual command – the compiler reads the header file automatically because of the #include directive.

Notice the use of the %1s format specifier in this example – to read the next character entered by the user.

Restricting accessibility

The static keyword can be used to restrict the accessibility of functions to the file in which they are created, in exactly the same way that static variables have restricted accessibility. This is recommended practice in larger programs that are spread over multiple “.c” files, to safeguard against accidental misuse of functions. For instance, the square() and multiply() functions can’t be directly called from the main() function in this example.

Begin a new program with a preprocessor instruction to include the standard input/output library functions

#include <stdio.h>

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