yeah i get this error. bad numeric conversion: positive overflow Still i
need some way to generate a 160 bit integer somehow. ... :(
On 8/9/06, james.jones@firstinvestors.com
From: "chun ping wang"
[code skipped] T n(Random::randint<T>(numeric_cast<T>(pow(2.0, num_digits - 1)), numeric_cast<T>(pow(2.0, num_digits))) [code skipped]
now num_digits is number of bits. If i pass 160 bit as like for DSA algorithm the program crashes. I pass 8 and it works, how come? Is there a better way to do this? Oh f is any function that can deteremine if a number is most likely a prime or not....
My guess is that numeric_cast<T>(pow(2.0, num_digits)) throws an overflow exception. I don't know what you're using for T, but obviously even a long long can't hold a 160-bit integer (at least not on any architecture I'm aware of).
To verify this, catch on overflow_error and see if this prevents the crash.
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