99b
Subj : Re: Need help, please!
To   : borland.public.cpp.borlandcpp
From : "Ed Mulroy [TeamB]" <dont_email_me@bitbuc.ket>
Date : Tue Nov 25 2003 12:52 pm

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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