pitfalls of registers variables

[shiva]

what  is the pitfalls of registers variables...?

[CommonTater]

If you mean designating a local variable as register, as in...

Code: [Select]

int register counter;

There should be no downside since it's only a suggestion for the compiler.  It will decide at compile time if it can do that or not.  Remember there are only a limited number of CPU registers available and generally it's best to let the optimizer make those decisions.

[AlexN]

what  is the pitfalls of registers variables...?

... and AFAIK for Pelles C the keywords auto and register has the same meaning and the compiler will decide itself which variables are kept in registers.

[CommonTater]

Thanks Alex... and FWIW, the help file says auto is the default for local variables...