Abl-electronic PIC Microcontrollers PIC16 Manual do Utilizador descarregar pdf (Página 140)

Now, the following code,

LCD_PRINT(temp)

will be preprocessed to this:

Lcd_Out_Cp("temp" ": "); Lcd_Out_Cp(IntToStr(temp));

Operator ##

Operator

## is used for token pasting: you can paste (or merge) two tokens togeth-

er by placing ## in between them (plus optional whitespace on either side). The

preprocessor removes the whitespace and the ##, combining the separate tokens

into one new token. This is commonly used for constructing identifiers.

For example, we could define macro

SPLICE for pasting two tokens into one iden-

tifier:

#define SPLICE(x,y) x ## _ ## y

Now, the call SPLICE(cnt, 2) expands to identifier cnt_2.

Note: mikroC does not support the older nonportable method of token pasting

using

(l/**/r).

Conditional Compilation

Conditional compilation directives are typically used to make source programs

easy to change and easy to compile in different execution environments. mikroC

supports conditional compilation by replacing the appropriate source-code lines

with a blank line.

All conditional compilation directives must be completed in the source or include

file in which they are begun.

mikroC

- C Compiler for Microchip PIC microcontrollers

mikroC

making it simple...

132

MikroElektronika:

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Abl-electronic PIC Microcontrollers PIC16 Manual do Utilizador Página 140