[avr-gcc-list] sqrt problems

[Jack Valmadre]

Hi,

I'm going to write a program that uses the sqrt() function to work out the 
hypotenuse of a right angled triangle.  I'm testing the function using this 
program on a 2313, but all the pins on PORTB go low.

#include <avr/io.h>
#include <math.h>

int main(void) {
 DDRB = 0xFF;
 PORTB = sqrt(9);
 return 0;
}

How can I fix this?

Thanks,
Jack