Is there a way to prevent getting the runtime error? James -----Original Message----- From: fpc-pascal [mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of Florian Klämpfl Sent: Wednesday, June 20, 2018 4:59 PM To: fpc-pascal@lists.freepascal.org Subject: Re: [fpc-pascal] math with infinity and NaN
Am 19.06.2018 um 23:50 schrieb James Richters: > I’ve been updating my old programs to use the MATH unit in freepascal > and while testing things I came across a runtime error 217 Invalid > floating point operation. Here is my test program > > Uses math; > > var > > variable1:double; > > variable2:double; > > Begin > > variable1:= Infinity; > > variable2:= -1*Infinity; > > Writeln(variable1,' ',Variable2,' ',Variable1+Variable2); > > End. > > My output is: > > Running "i:\programming\test\testmath.exe " > > An unhandled exception occurred at $004015F6: > > EInvalidOp: Invalid floating point operation > > $004015F6 main, line 8 of i:/programming/test/testmath.pas > > +Inf -Inf > > According to the link here: https://en.wikipedia.org/wiki/NaN > > NaN should be produced: No. The invalid operation is not masked by default. If you do so, FPC just write Nan. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
