volatile variables as argument to function

Question

Having this code:

typedef volatile int COUNT;       

COUNT functionOne( COUNT *number );

int  functionTwo( int *number );

I can\'t get ri

Answer 1

I don't understand why you'd want to have the volatile qualifier on a function return type. The variable that you assign the function's return value to should be typed as a volatile instead.

Try making these changes:

typedef int COUNT_TYPE;
typedef volatile COUNT_TYPE COUNT;       

COUNT_TYPE functionOne( COUNT number );

COUNT_TYPE functionTwo( COUNT_TYPE number );

And when calling functionTwo(), explicitly cast the argument:

functionTwo( (COUNT_TYPE)arg );

HTH, Ashish.