Take this C program:
d = 1.401298 * pow(10, -45);
printf("d=%g\n", (double) (float) d);
One would expect that the output would be 1.401298e-45 or 0 if a float
cannot contain this number. Instead, I get 2.65249e-315. Whats up
Works at least as of glibc-2.3.2-95.6.