### large numbers, c++ ?

Hi, I have numbers up to order e100 (i.e. 10^100). How can I store them in c++?

Thanks! :)

hansaaa :)
Long long, double , long double
nope, long long only supports

–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.

long double supports^, according to http://msdn.microsoft.com/en-us/library/s3f49ktz(v=vs.80).aspx,

1.7E +/- 308, which, according to http://msdn.microsoft.com/en-us/library/s3f49ktz(v=vs.80).aspx, are 15 digits, but, I don't see how, because 1.7E308 should be 308 digits...

in the end, though, on my machine, neither long long, nor double or long double support the numbers I am trying to use.

e.g.

 ``123456789`` ``````long long l; l = 2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000; double ll; ll = 2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000; long double lll; lll = 2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000*2000; ``````

all give zero. :S

using
 ``12345678`` ``````long long l; l = 2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll; double ll; ll = 2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll; long double lll; lll = 2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll*2000ll; ``````

doesn't work either, it gives some number

-5.048253707305615360e+018
Last edited on
aha, 2.0e3 works! Thanks!!
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