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'extern' keyword for an array

John Linq

In file AAA.c

const char CMD_Fire[] = "FIRE";

In file BBB.c

extern const char CMD_Fire[];

It seems that, the compiler is not able to know the size of CMD_Fire[], when compiling BBB.c

So, I have to hard code the size of CMD_Fire[] in BBB.c

Then, if I change the command to "Fire it!", I will need to change the size of CMD_Fire[] everywhere.

Is there any skill to handle this?

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  • 0 in reply to Andy Neil

    No, it won't - not for an array of unspecified size like this!<p>

    I see .. I rarely use sizeof(), so I'm not aware of all of its limitations.

    Another thing, though - the char array is initialized as a string, so it is terminated by a null ('\0') character. Therefore, the string functions (like strlen()) from the standard libary can be used.

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  • 0 in reply to Andy Neil

    No, it won't - not for an array of unspecified size like this!<p>

    I see .. I rarely use sizeof(), so I'm not aware of all of its limitations.

    Another thing, though - the char array is initialized as a string, so it is terminated by a null ('\0') character. Therefore, the string functions (like strlen()) from the standard libary can be used.

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