[Dev-C++] Use of const qualifier

[Scott W. <se...@al...>]

Hi,

You've all been so helpful, I'm back for more . . .

I'm curious about the use of the "const" qualifier as it applies to
prototyping function arguments.  In particular, suppose I have a function:

double myfunc(double x, double *y)

where myfunc uses the values of x and the array members of y but doesn't
change them.  Is there then an efficiency (speed) to be gained by instead
declaring:

double myfunc(const double x, const double *y)?

Are there other advantages/disadvantages?

Thanks,
Scott