simple questions

[Wayne_]

But this thread is about the line:-

#define test 0x42

Either, the poster doesn't know much about C so describing the ins and outs of lvalues and const's isn't going to help or John P post is correct and the poster has been told a joke which they do not understand.

Based on the original post I would say all this stuff about const is off topic.

The last you will hear from me on the subject, in this thread anyway

[Gavin Pinto]

[Gavin Pinto]

You might look at this ccs thread and ask many questions

https://www.ccsinfo.com/forum/viewtopic.php?t=23400

Now I will show some interesting enum statements that compile with ccs.

1. enum{u,v,w};

2. enum {a,b,c} *ep;

3. enum ee{x,y,x}*ez;

4. enum xy{i,j,k}uv;

5.enum {a=0xFFFFFFFF};

6.enum{a=0xFFFFFFFF}ep;

7.enum{a=4294967298}ep; // Compiles in #device ANSI mode (signed)why ?????

8. enum{a=0b11111111111111111111111111111111}ep; //Compiles in #device ANSI mode (signed) why?????

9.enum{a=-2147483649}ep;//Compiles in #device ANSI mode (signed) why?????

10. enum{a=-214748364987654321}ep;//Compiles in #device ANSI mode (signed) why?????




Those that do not compile

1. enum {a=0xFFFFFFFF}*ep;

*** Error 84 : Pointers to bits are not permitted

2.enum{a=0x100000000}ep;

***Error 103 : Constant out of the valid range

enum{a=O40000000000}ep; //Octal representation

***Error 103 : Constant out of the valid range



CCS compiler version 4.104 PCH command-line. Processor PIC18F8722


Any questions or discussions on the above statements?

C Enumeration Declarations

http://msdn.microsoft.com/en-us/library/whbyts4t.aspx
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Clear Logic