PCWHD IDE COMPILER Custom Computer Services Inc (CCS), PCWHD IDE COMPILER Datasheet - Page 54

• Manufacturer Part Number: PCWHD IDE COMPILER
• Description: PCWHD PIC10,16,18,24, DSPIC
• Manufacturer: Custom Computer Services Inc (CCS)
• Type: Compilerr

Specifications of PCWHD IDE COMPILER

• For Use With/related Products: Microchip PIC10, PIC12, PIC16, PIC18, PIC24, dsPIC MCUs
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 429-1009

Reference Parameters
The compiler has limited support for reference parameters. This increases the readability of code
and the efficiency of some inline procedures. The following two procedures are the same. The one
with reference parameters will be implemented with greater efficiency when it is inline.
Variable Argument Lists
The compiler supports a variable number of parameters. This works like the ANSI requirements
except that it does not require at least one fixed parameter as ANSI does. The function can be
passed any number of variables and any data types. The access functions are VA_START,
VA_ARG, and VA_END. To view the number of arguments passed, the NARGS function can be used.
A function with variable number of parameters requires two things. First, it requires the ellipsis (...),
which must be the last parameter of the function. The ellipsis represents the variable argument list.
Second, it requires one more variable before the ellipsis (...). Usually you will use this variable as a
method for determining how many variables have been pushed onto the ellipsis.
40
funct_a(int*x,int*y){
}
funct_a(&a,&b);
funct_b(int&x,int&y){
}
funct_b(a,b);
/*
stdarg.h holds the macros and va_list data type needed for variable
number of parameters.
*/
#include <stdarg.h>
/*Traditional*/
if(*x!=5)
/*Reference params*/
if(x!=5)
*y=*x+3;
y=x+3;