Default Parameters in C ?????

Hi Folks,

I was stuck up with one small doubt on Function parameters in Pro*C
file writting.

int b = 3;
main()
{
f(3);
}

f(a,b)
{
int a;
---
--
return --;
}

can i use default parameter 'b' in the called function,where calling the function from main() through single parameter,is this is possible in pro*c.

Please i want immediate response.