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

It's possible that I am way off base here but volatile isn't something normally associated with stack memory region. Therefore I'm not sure if the following prototype really makes much sense.

volatile int functionOne(volatile int number);

I'm not sure how a returned integer can be volatile. What's going to cause the value of EAX to change? The same applies to the integer. Once the value is pushed onto the stack so that it can be passed as a parameter what's going to change its value?