• sins666 (5/5) Jun 30 2010 I found a Bug.The bug lives in function of pow in std.math.
• Simen kjaeraas (8/13) Jun 30 2010 I would recommend discussing such in digitalmars.D.learn.
• sins666 (11/24) Jun 30 2010 import std.math;
• Simen kjaeraas (9/19) Jul 01 2010 The mistake is in your code. std.math.pow has a version that takes
• sins666 (6/25) Jul 01 2010 takes

sins666 <d-bugmail puremagic.com> writes:

I found a Bug.The bug lives in function of pow in std.math.

When wake up the bug that, we select value of minus to second
argument of pow.
And happen the <<object.Error: Integer Divide by Zero>> error.

I think that is a Bug. Is it?

"Simen kjaeraas" <simen.kjaras gmail.com> writes:

sins666 <d-bugmail puremagic.com> wrote:

 I found a Bug.The bug lives in function of pow in std.math.

 When wake up the bug that, we select value of minus to second
 argument of pow.
 And happen the <<object.Error: Integer Divide by Zero>> error.

 I think that is a Bug. Is it?

I would recommend discussing such in digitalmars.D.learn.

Now, I'm not able to recreate this. Am I right to understand
it to be:

std.math.pow( 5, -3 ); ?

If not, would you please post code that triggers the bug?

-- 
Simen

sins666 <d-bugmail puremagic.com> writes:

== Quote from Simen kjaeraas (simen.kjaras gmail.com)'s article
 sins666 <d-bugmail puremagic.com> wrote:
 I found a Bug.The bug lives in function of pow in std.math.

 When wake up the bug that, we select value of minus to second
 argument of pow.
 And happen the <<object.Error: Integer Divide by Zero>> error.

 I think that is a Bug. Is it?

 I would recommend discussing such in digitalmars.D.learn.
 Now, I'm not able to recreate this. Am I right to understand
 it to be:
 std.math.pow( 5, -3 ); ?
 If not, would you please post code that triggers the bug?

import std.math;
import std.stdio;

void main()
{
    writeln(pow(5, 2)); // 25
    writeln(pow(5, 0)); // 1
    writeln(pow(5, -3)); // object.Error: Integer Divide by Zero
}

And dmd version is 2.047.
Was I mistake in my source.or bug?

"Simen kjaeraas" <simen.kjaras gmail.com> writes:

sins666 <d-bugmail puremagic.com> wrote:

 import std.math;
 import std.stdio;

 void main()
 {
     writeln(pow(5, 2)); // 25
     writeln(pow(5, 0)); // 1
     writeln(pow(5, -3)); // object.Error: Integer Divide by Zero
 }

 And dmd version is 2.047.
 Was I mistake in my source.or bug?

The mistake is in your code. std.math.pow has a version that takes
only integers, and returns only integers. That is the version you
are using.

If instead you try:

writeln(pow(5.0, -3.0));

You should see improvement.

-- 
Simen

sins666 <d-bugmail puremagic.com> writes:

== Quote from Simen kjaeraas (simen.kjaras gmail.com)'s article
 sins666 <d-bugmail puremagic.com> wrote:
 import std.math;
 import std.stdio;

 void main()
 {
     writeln(pow(5, 2)); // 25
     writeln(pow(5, 0)); // 1
     writeln(pow(5, -3)); // object.Error: Integer Divide by


Zero
 }

 And dmd version is 2.047.
 Was I mistake in my source.or bug?

 The mistake is in your code. std.math.pow has a version that

takes
 only integers, and returns only integers. That is the version you
 are using.
 If instead you try:
 writeln(pow(5.0, -3.0));
 You should see improvement.

Oh, I see.
Thank you for your response and advice.

even so, why is that "object.Error: Integer Divide by Zero"...