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From: Dara Hazeghi <dhazeghi@yahoo.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: libstdc++/10689: pow(std::complex(0),1/3) returns (nan, nan) instead of 0.
Date: Sat, 10 May 2003 19:36:00 -0000	[thread overview]
Message-ID: <20030510193600.24085.qmail@sources.redhat.com> (raw)

The following reply was made to PR libstdc++/10689; it has been noted by GNATS.

From: Dara Hazeghi <dhazeghi@yahoo.com>
To: gcc-gnats@gcc.gnu.org, Daniel.Levine@jhuapl.edu
Cc:  
Subject: Re: libstdc++/10689: pow(std::complex(0),1/3) returns (nan, nan) instead of 0.
Date: Sat, 10 May 2003 12:26:42 -0700

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
 trail&database=gcc&pr=10689
 
 Hello,
 
 I can confirm this problem with 3.3 branch and mainline (20030508).  
 However, next time you send in a testcase, make sure it compilers first.
 
 Dara
 
 #include <iostream>
 #include <complex>
   using namespace std;
 int main() {
   complex<double> complexZero;
   complex<double> cubeRootof0;
   complex<double> zeroToThe1;
   cubeRootof0 = pow(complexZero, 1.0/3.0);
   cerr << cubeRootof0 << endl; // Should be 0.0;
   zeroToThe1 = pow(complexZero, 1.0);
   cerr << zeroToThe1 << endl; // Should be 0.0;
   zeroToThe1 = pow(complexZero, 1);
   cerr << zeroToThe1 << endl; // Is 0.0;
 }
 


             reply	other threads:[~2003-05-10 19:36 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-10 19:36 Dara Hazeghi [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-05-20  6:53 gdr
2003-05-18 13:06 Gabriel Dos Reis
2003-05-16 20:04 bkoz
2003-05-08 18:16 Daniel.Levine

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