Re: [Dev-C++] Numerical Difference betewen Dev-Cpp and Microsoft C++.NET

[Matthews <dem...@uw...>]

Actually, there's a few small changes in the decimals besides iteration 3.
And your's is the best english I've heard in a while :)


At 06:55 PM 08/01/2003 -0800, Lu=EDs" "Br=E1s wrote:
>Hi there=85
>
>I=92ve just finished developing an mathematical
>optimization program=20
>in C++ for my Thesis. My base compiler that was
>installed in my university was Microsoft Visual=20
>C++.Net. Now I=92m trying to compile with Dev-Cpp in my=20
>computer at home . The results were the same, until
>my example 23, failed to converge in Dev-Cpp. When=20
>dealing with math every decimal counts. And this is
>the problem. The results are the following:
>
>----------------------------------
>Iteration function
>          error
>          next step
>
>--------NET-----------------------------DEV----------
>
>0   6.08269457903887380000    6.08269457903887380000=20
>   14.38658488183035000000   14.38658488183034500000
>    1.00000000000000000000    1.00000000000000000000
>
>1   6.08269457903887380000    6.08269457903887380000
>   14.38658488183035000000   14.38658488183034500000
>    0.15334071686133940000    0.15334071686133718000
>
>2   5.64283384487765800000    5.64283384487766430000
>   11.71651970320963600000   11.71651970320965800000
>    0.23998975404550715000    0.23998975404523476000
>
>3   5.29623368056405490000    5.29623368056461440000
>    9.25439173550483750000    9.25439173550664760000
>    0.13589203600495686000    Error.
>
>As you can in iteration 3 the program fails. I know=20
>that is difficult to find the problem just by looking=20
>at numbers!! The difference is always in the last=20
>decimal places (>12).=20
>
>I use templates in all class=92s and it=92s being=20
>initialize with double. My compilation options are=20
>default. My computer is a Pentium 3. I think its=20
>probably the double that has different=20
>decimal places? I=92ve changed to (long double) but the=20
>function pow in math doesn=92t accept anything=20
>different from double. Even converting to double=20
>the results are the same.
>
>Thanks in advance for any help.
>
>P.S. Sorry for my bad English
>
>
>=3D=3D=3D=3D=3D
>+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=
=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D
>Lu=EDs Filipe Delgado Br=E1s
>lf...@ya...
>http://www.fotopt.net/autor.asp?autor=3D2637
>+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=
=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D+=3D
>
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