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From: Ioannis Vranos <ivr@remove.this.grad.com>
Newsgroups: comp.lang.ada,comp.lang.c++,comp.realtime,comp.software-eng
Subject: Re: [OT] Re: Teaching new tricks to an old dog (C++ -->Ada)
Date: Sat, 05 Mar 2005 22:14:44 +0200
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Date: 2005-03-05T22:14:44+02:00
List-Id: <comp.lang.ada>

Martin Krischik wrote:

> Well that's easy:
> 
> unsigned int X = -1;
> 
> char Y [10];
> Y [10] = "X";
> 
> Or bit more subtle:
> 
> unsigned int X Day_Of_Month = 32;



Day_Of_Month does not compile. You can make the Day_Of_Month an enum:


enum Day_Of_Month { Mon=1, Sun=7};


int main()
{
   Day_Of_Month X= 32;
}


C:\c>g++ temp.cpp -o temp.exe
temp.cpp: In function `int main()':
temp.cpp:6: error: invalid conversion from `int' to `Day_Of_Month'

C:\c>



The char Y thing does not compile, but try this:

#include <vector>

int main()
{
     using namespace std;

    vector<char> Y (10);

    Y.at(10) = 'X';
}


The most important thing that you may be missing, is that in C++ you can 
choose the level of abstraction and safety you want by using some 
third-party library or framework that fits your needs.


For example consider this:


// Using .NET facilities
int main()
{
    using namespace System;

    array<int> ^IntArray= {1,2,3,4,5,6,7,8,9,0};

    IntArray[10]= 10;
}


C:\c>temp

Unhandled Exception: System.IndexOutOfRangeException: Index was outside 
the boun
ds of the array.
    at main()

C:\c>



#include <iostream>
#include <ostream>

int main()
{
    using namespace System;
    using namespace std;

    int x= 71;

    char c= x.ToString()[0];

    cout<<c<<endl;

    cout<<x.ToString()->Length<<endl;
}

C:\c>temp
7
2

C:\c>


The above make use of the .NET 2 framework facilities, which provide 
additional safety and the high level things you are mentioning.


Bottom line is in C++ you can be as safe and as high level you like. 
Just pick the suitable libraries or frameworks.



-- 
Ioannis Vranos

http://www23.brinkster.com/noicys