digitalmars.D.learn - 'real' not able to store it's largest value
- colin (26/26) May 22 2017 Am I doing something wrong here?
- Adam D. Ruppe (4/5) May 22 2017 You convert to real AFTER doing the exponent on an integer.
- =?UTF-8?Q?Ali_=c3=87ehreli?= (7/16) May 22 2017 Like some other languages, expressions are mostly evaluated in
- colin (2/2) May 22 2017 D'oh!
Am I doing something wrong here? real.max evaluates to: 1.18973e+4932 So, I'd expect to be able to store any value up to that... however ``` void main() { writeln("Real max: ", real.max); foreach(i; 0..10){ writefln!("1024 ^^ %s = %s")(i, real(1024 ^^ i)); } } ``` Output: ``` Real max: 1.18973e+4932 1024 ^^ 0 = 1 1024 ^^ 1 = 1024 1024 ^^ 2 = 1.04858e+06 1024 ^^ 3 = 1.07374e+09 1024 ^^ 4 = 0 1024 ^^ 5 = 0 1024 ^^ 6 = 0 1024 ^^ 7 = 0 1024 ^^ 8 = 0 1024 ^^ 9 = 0 ```
May 22 2017
On Monday, 22 May 2017 at 20:26:27 UTC, colin wrote:writefln!("1024 ^^ %s = %s")(i, real(1024 ^^ i));You convert to real AFTER doing the exponent on an integer. change `real(1024 ^^ i)` to `real(1024) ^^ i` and you should get a different result.
May 22 2017
On 05/22/2017 01:26 PM, colin wrote:Am I doing something wrong here? real.max evaluates to: 1.18973e+4932 So, I'd expect to be able to store any value up to that... however ``` void main() { writeln("Real max: ", real.max); foreach(i; 0..10){ writefln!("1024 ^^ %s = %s")(i, real(1024 ^^ i));Like some other languages, expressions are mostly evaluated in isolation. 1024 ^^ i is an int, which cannot represent anything close to real.max. :) This should work: real(1024) ^^ i Ali
May 22 2017