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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?

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  • 0 in reply to Brian Szuter

    "I was surprised since other compilers compiled the const version without errors (GNU X-Tools for one)."

    I you sure that they were all 'C' compilers - not C++?

    Also, are you sure that you tried this in their strict ANSI mode?

    "In addition, I've read Good Style practices that recommended using const rather than #define"

    Again, are you sure they were specifically for 'C' - rather than C++, or any other language?

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  • 0 in reply to Brian Szuter

    "I was surprised since other compilers compiled the const version without errors (GNU X-Tools for one)."

    I you sure that they were all 'C' compilers - not C++?

    Also, are you sure that you tried this in their strict ANSI mode?

    "In addition, I've read Good Style practices that recommended using const rather than #define"

    Again, are you sure they were specifically for 'C' - rather than C++, or any other language?

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