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'const' and the 'switch' statement

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RaulHuertas

Joined: 31 May 2008
Posts: 7

'const' and the 'switch' statement

Posted: Fri Jun 06, 2008 3:26 pm

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Hi

At the beginning of my code I'm setting these variables:

Code:

/*COMANDOS*/
const char ENVIARPAQUETEMUESTRAS = 'N';
const char ENVIARUNAMUESTRA = 'E';
const char ENVIOCONTINUODEMUESTRAS = 'C';
const char TERMINARENVIOCONTINUO = 'T';
const char RESPONDEROK = '?';
const char EMPEZARCONEXION = 'S';
const char TERMINARCONEXION = 'X';
const char DESPERTAR = 'D';
const char DORMIR = 'Q';

and then I want to use them in this switch statement:

Code:

comando = getc();

switch( comando ){
case ENVIARUNAMUESTRA : enviarUnicaMuestra(); break;
case ENVIOCONTINUODEMUESTRAS : enviarMuestrasContinuamente(); break;
case ENVIARPAQUETEMUESTRAS : enviarPaqueteMuestras(); break;
case TERMINARCONEXION : return;
}

But I'm getting this compilation error:

Error 27, Line..., expression must evaluate to a constant. That is with ENVIOVONTINUODEMUESTRAS .

What's wrong with this code? :S

Also... are enums chars?. If they are chars I'll define again the constants as enums.

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Fri Jun 06, 2008 3:42 pm

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See this section in the CCS manual:

Quote:

#CASE
Syntax: #case
Elements: None
Purpose: Will cause the compiler to be case sensitive.
By default the compiler is case insensitive.

Fix the problem by adding #case to your program.

RaulHuertas

Joined: 31 May 2008
Posts: 7

Thanks
Posted: Fri Jun 06, 2008 9:09 pm

Thanks men, It works. I didn't know that issue. Thanks!

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