Subj : Re: Need help, please!
To   : borland.public.cpp.borlandcpp
From : "Bojidar Markov" <me@nosmap.com>
Date : Tue Nov 25 2003 10:13 pm

Ed Mulroy,

Thank you very much for the time spent, I realy appreciate your help
..
There is one thing I am not sure about, where are the two friend and member
functions used?
Sorry for the lame questions.

Best regards,
Bojidar Markov


"Ed Mulroy [TeamB]" <dont_email_me@bitbuc.ket> wrote in message
news:3fc396ed@newsgroups.borland.com...
> A simple array contains no information on its size and unless I
> misunderstand something one cannot overload built in operators for native
> types.  You must be speaking of a some kind of container which represents
an
> array and which can report its size.  C++ provides the container class
> vector so I'll use that.  As IDE builds and GUI output cannot be shown in
a
> newsgroup message, here is a screen capture of an example done as a
console
> mode program built from the command line.
>
> -----------------------
> C:\Lookat\q420
> >type q420.cpp
>   #include <cstdio>
>   #include <cstdlib>
>   #include <vector>
>
>   using namespace std;
>
>   typedef vector<double> DbleVect;
>
>   DbleVect operator - (const DbleVect& d1, const DbleVect& d2)
>     {
>     int num1 = d1.size();
>     int num2 = d2.size();
>
>     if (num1 > num2)
>       num1 = num2;
>
>     DbleVect result;
>
>     for (int i = 0; i < num1; ++i)
>       {
>       result.push_back(d2.at(i) - d1.at(i));
>       }
>
>     return result;
>     }
>
>   int main()
>     {
>     DbleVect a;
>     DbleVect b;
>     DbleVect c;
>
>     randomize();
>
>     for (int i = 0; i < 10; ++i) // populate the vectors
>       {
>       a.push_back(rand() / 10.0);
>       b.push_back(rand() / 10.0);
>       }
>
>     c = b - a;
>
>     for (int i = 0; i < 10; ++i) // display results
>       {
>       printf("%0.2f - %0.2f = %0.2f\n", a[i], b[i], c[i]);
>       }
>
>     return 0;
>     }
>
> C:\Lookat\q420
> >bcc32 -WCR -v q420
> Borland C++ 5.6.4 for Win32 Copyright (c) 1993, 2002 Borland
> Q420.CPP:
> Turbo Incremental Link 5.64 Copyright (c) 1997-2002 Borland
>
> C:\Lookat\q420
> >q420
> 2913.10 - 2786.00 = 127.10
> 1756.80 - 3273.70 = -1516.90
> 754.30 - 2349.70 = -1595.40
> 2177.10 - 2254.10 = -77.00
> 407.10 - 1112.10 = -705.00
> 1741.80 - 589.30 = 1152.50
> 2564.30 - 511.80 = 2052.50
> 2004.60 - 2991.90 = -987.30
> 2212.90 - 1193.00 = 1019.90
> 2647.70 - 2474.80 = 172.90
>
> C:\Lookat\q420
> >
> -----------------------
>
> .  Ed
>
> > Bojidar Markov wrote
> > news:3fc36926$1@newsgroups.borland.com...
> >
> > It seems you didnt understand my request.
> > I was asking someone to help me with this task which have to
> > be made in C++ (this is why im posting here), not in Delphi (if
> > it was in Delphi i wouldn't asking at all).
> >
> > Still looking forward for a help...
>
>

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