Thread: What is the syntax for a #define for several lines of code?

What is the syntax for a #define for several lines of code? For example:


#define SEND <syntax> setPort();clearDisplay() <end syntax>

Thought it'd b a simple

#define SEND {setPort();clearDisplay()}

or

#define SEND (setPort();clearDisplay())

but no, won't work... By the way I'm using the SDCC compiler for 8051 micro controllers.

seen an example of a weird syntax dividing lines with the '/' sign, but can't seem to make that work either

thanx for your help

Code:

#define SEND {setPort();clearDisplay();}

#define x printf("heh"); \
printf("wtf lol\n");

Originally posted by wtf
#define x printf("heh"); \
printf("wtf lol\n");

Yeh, thats even better. But it does lead to messy code. If youre going to do lots of things in a #define you might as well just make it a function.

I was wondering if this could properly be called a function macro?

Code:

#define SEND {setPort();clearDisplay();}

Also, this:

originally posted by Brian
Yeh, thats even better. But it does lead to messy code. If youre going to do lots of things in a #define you might as well just make it a function.

An exception would be if the #define made things speedier?

Originally posted by kermit

An exception would be if the #define made things speedier?

with modern compilers, operating systems, and processors function calls take a negligible amount of time ( in most cases ).

When designing code you should always design for readability above all else, and then when the project is complete analyze the system and if you find overly time-consuming areas, optimize those.

Readability does not necessarily have influence on the speed. One can write unreadable code which is very slow.

What about inline functions? Does your compiler support this? Inline functions are very readable, but they are no real functions. Your compiler will try to make calls to inline functions as fast as possible.