Test bits: float

How would we test the bits of a float value?

float f = 1024;

int n;

for (n = 0; n < 32; n++)

if (f  & (1 << n))

printf ("1");

else

printf ("0");

Compile error!

Need a way to look at f as if it were int:

float f = 1024;

int n, i;

i = (int) f;

for (n = 0; n < 32; n++)

if (i  & (1 << n))

printf ("1");

else

printf ("0");