What is macro in c? tccicomputercoaching.com

What is macro in c? tccicomputercoaching.com

tccicomputercoaching.com

tccicomputercoaching.com  Macro processor that is used automatically by the C compiler to transform your program before actual compilation. It is called a macro

processor because it allows you to

define macros, which are brief abbreviations for longer constructs.  A macro is a segment of code which is replaced by the value of macro. Macro is defined by #define directive.  Macros in C are string replacements commonly used to define constants.

tccicomputercoaching.com  The function-like macro looks like function call. For example:  For example: #define MAX 1000  It sets the value of identifier MAX to 1000 and whenever you want to use 1000 in your program you can use MAX instead of writing 1000.

tccicomputercoaching.com  Argumented macro substitution (this permits us to define more complex and more useful forms of replacements): It takes the form: #define identifier (f1, f2,.., fn) string  For example, #define CUBE(x) (x*x*x)

tccicomputercoaching.com  If the following statement appear in the prog. Volume = CUBE (side);  Then the pre-processor will expand this statement to:  Volume = (side*side*side);

tccicomputercoaching.com To learn more about C Programming Language Call us @ 9825618292 Visit us @ www.tccicomputervoaching.com

tccicomputercoaching.com

Thank you for watching