How do I avoid scientific notation for large numbers?

Question

I am doing 2^1000 and I am getting this:

1.07151e+301

Is there any way to actually turn this into a proper number without the e+301, or at least can anyone s

Answer 1

So, I'm thinking that what you really want is just the ability to print it without scientific notation. If you're using printf, what you want is:

printf( "%f1000.0", value );
// note that 1000 is way larger than need be,
// I'm just too lazy to count the digits

With cout, try something like:

cout.setf(ios::fixed);
cout << setprecision(0) << value;

If you want to print it as a power of two (2^1000 vs 10715...), you're on your own.

Answer 2

You are getting as precise a number as the variable type can support. That number is on the order of 1 followed by 301 zeroes. To get a precise number you'll have to work with a library that supports large numbers, or work with a language that is made for that kind of math (maple, matlab, etc)