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Compiler error when declaring array using constant

Brian Szuter

The following code generates a this error when compiled:

C51 COMPILER V6.02 - SN: XXXXX-XXXXX
COPYRIGHT KEIL ELEKTRONIK GmbH 1987 - 1999
*** ERROR C221 IN LINE 7 OF QUEUE_I.H: non-constant case/dim expression

const unsigned char code BUF_SIZE = 40;

BYTE Qbuf[BUF_SIZE];

I get the same error whether or not I use "code". I've worked around this by using
#define BUF_SIZE 40
but this isn't optimal for style, and debugging purposes.

Has anyone else seen this problem?

Parents
  • 0 in reply to Drew Davis

    "const in ANSI C isn't really a compile-time constant"

    As is obvious from a quick look at at string.h:

    extern char *strchr  (const char *s, char c);
extern int   strpos  (const char *s, char c);
extern char *strrchr (const char *s, char c);
extern int   strrpos (const char *s, char c);
    Clearly the consts here can't be indicating compile-time constants!

    (They simply flag items that should not be modified at run-time).

Reply
  • 0 in reply to Drew Davis

    "const in ANSI C isn't really a compile-time constant"

    As is obvious from a quick look at at string.h:

    extern char *strchr  (const char *s, char c);
extern int   strpos  (const char *s, char c);
extern char *strrchr (const char *s, char c);
extern int   strrpos (const char *s, char c);
    Clearly the consts here can't be indicating compile-time constants!

    (They simply flag items that should not be modified at run-time).

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