digitalmars.D.bugs - [Issue 2906] New: writef problem with formatting floating point
- d-bugmail puremagic.com (45/45) Apr 27 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2906
- d-bugmail puremagic.com (9/9) Apr 28 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2906
- d-bugmail puremagic.com (9/9) Apr 28 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2906
- d-bugmail puremagic.com (9/9) Apr 29 2009 http://d.puremagic.com/issues/show_bug.cgi?id=2906
http://d.puremagic.com/issues/show_bug.cgi?id=2906 Summary: writef problem with formatting floating point Product: D Version: 2.030 Platform: PC OS/Version: Windows Status: NEW Severity: normal Priority: P2 Component: Phobos AssignedTo: bugzilla digitalmars.com ReportedBy: bugzilla digitalmars.com The following code: import std.stdio ; import std.date ; int main ( string[] args ) { invariant n = 1000000000L ; invariant delta = 1.0 / n ; invariant startTime = getUTCtime ( ) ; real sum = 0.0 ; for ( auto i = 1L ; i <= n ; ++i ) { invariant x = ( i - 0.5 ) * delta ; sum += 1.0 / ( 1.0 + x * x ) ; } invariant pi = 4.0 * sum * delta ; invariant elapseTime = ( cast (real) ( getUTCtime ( ) - startTime ) ) / ticksPerSecond ; writefln ( "==== D Sequential pi = %f" , pi ) ; writefln ( "==== D Sequential iteration count = %d" , n ) ; writefln ( "==== D Sequential elapse = %f" , elapseTime ) ; writefln ( "==== D Sequential elapse = %s" , elapseTime ) ; printf ( "==== D Sequential elapse = %Lg\n" , elapseTime ) ; return 0 ; } Produces the output: ==== D Sequential pi = -88796093704866379077000000000000000000000000.000000 ==== D Sequential iteration count = 1000000000 ==== D Sequential elapse = -1204799831137578238800000000000000000000000000000000 00000000000000000000000000000000000000000000000000000000000000000000000000000000 00000000000.000000 ==== D Sequential elapse = -1.2048e+142 ==== D Sequential elapse = 110.718 writefln() is incorrectly formatting reals with the %f and %s formats. --
Apr 27 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2906 andrei metalanguage.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Fixed in svn. --
Apr 28 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2906 braddr puremagic.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|FIXED | Andrei, would you add unit tests for this so that it doesn't regress? :) --
Apr 28 2009
http://d.puremagic.com/issues/show_bug.cgi?id=2906 andrei metalanguage.com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution| |FIXED Added unittest. --
Apr 29 2009