Function Overloading does not work?

[Anil Gupte]

I get two errors
void DisplayProjecte dValue(double amount, int years)
{
Random __gc * r = new Random();
int randomRate = r->Next(0, 20);
DisplayProjecte dValue(amount, years, randomRate);
}

void DisplayProjecte dValue(double amount, int years, double rate)
{
double rateFraction = 1 + (rate/100);
double finalAmount = amount * Math::Pow(rateF raction, years);
finalAmount = Math::Round(fin alAmount, 2);
Console::WriteL ine(S"--------------------------------------------");
Console::WriteL ine(S"Investmen t Amount: ");
Console::Write( amount);
Console::WriteL ine(S"Growth Rate [%]: ");
Console::Write( rate);
Console::WriteL ine(S"Period [years]: ");
Console::Write( years);
Console::WriteL ine (S"Projected Final value of Investment: ");
Console::Write( finalAmount);
Console::WriteL ine(S"--------------------------------------------");
}

I tried changing the last line of the first function to:
DisplayProjecte dValue(amount, years, randomRate->ToDouble(0)) ;
but that also gave me errors.

This is from a book Visual C++ .Net by Templeman and Olsen (Microsoft
Press).

--
Anil Gupte

https://www.keeninc.net

https://www.icinema.com

[Anil Gupte]

Re: Function Overloading does not work?

I should add the error I am getting is: error C2660: 'DisplayProject edValue'
: function does not take 3 arguments

TIA,
--
Anil Gupte

https://www.keeninc.net

https://www.icinema.com

"Anil Gupte" <anil-list@icinema.co mwrote in message
news:OdEFhB1LIH A.5244@TK2MSFTN GP03.phx.gbl...

>I get two errors
void DisplayProjecte dValue(double amount, int years)
{
Random __gc * r = new Random();
int randomRate = r->Next(0, 20);
DisplayProjecte dValue(amount, years, randomRate);
}
>
void DisplayProjecte dValue(double amount, int years, double rate)
{
double rateFraction = 1 + (rate/100);
double finalAmount = amount * Math::Pow(rateF raction, years);
finalAmount = Math::Round(fin alAmount, 2);
Console::WriteL ine(S"--------------------------------------------");
Console::WriteL ine(S"Investmen t Amount: ");
Console::Write( amount);
Console::WriteL ine(S"Growth Rate [%]: ");
Console::Write( rate);
Console::WriteL ine(S"Period [years]: ");
Console::Write( years);
Console::WriteL ine (S"Projected Final value of Investment: ");
Console::Write( finalAmount);
Console::WriteL ine(S"--------------------------------------------");
}
>
I tried changing the last line of the first function to:
DisplayProjecte dValue(amount, years, randomRate->ToDouble(0)) ;
but that also gave me errors.
>
This is from a book Visual C++ .Net by Templeman and Olsen (Microsoft
Press).
>
--
Anil Gupte

https://www.keeninc.net

https://www.icinema.com

>

[David Wilkinson]

Re: Function Overloading does not work?

Anil Gupte wrote:

I get two errors
void DisplayProjecte dValue(double amount, int years)
{
Random __gc * r = new Random();
int randomRate = r->Next(0, 20);
DisplayProjecte dValue(amount, years, randomRate);
}
>
void DisplayProjecte dValue(double amount, int years, double rate)
{
double rateFraction = 1 + (rate/100);
double finalAmount = amount * Math::Pow(rateF raction, years);
finalAmount = Math::Round(fin alAmount, 2);
Console::WriteL ine(S"--------------------------------------------");
Console::WriteL ine(S"Investmen t Amount: ");
Console::Write( amount);
Console::WriteL ine(S"Growth Rate [%]: ");
Console::Write( rate);
Console::WriteL ine(S"Period [years]: ");
Console::Write( years);
Console::WriteL ine (S"Projected Final value of Investment: ");
Console::Write( finalAmount);
Console::WriteL ine(S"--------------------------------------------");
}

Anil:

In C++, a definition or declaraion of a function must appear before it
can be used.

--
David Wilkinson
Visual C++ MVP

[Anil Gupte]

Re: Function Overloading does not work?

That worked, but that is vey weird - seems like the good old linear Fortran
Programming days! Why should the position in a file have anything to do
with a function being recognized?

Also, why does this line not generate at least a warning if not an error?

DisplayProjecte dValue(amount, years, randomRate);

when randomRate is an int and the function is expecting a double?

Thanx,

--
Anil Gupte

https://www.keeninc.net

https://www.icinema.com

"David Wilkinson" <no-reply@effisols. comwrote in message
news:unmF832LIH A.5716@TK2MSFTN GP04.phx.gbl...

Anil Gupte wrote:

>I get two errors
>void DisplayProjecte dValue(double amount, int years)
>{
>Random __gc * r = new Random();
>int randomRate = r->Next(0, 20);
>DisplayProject edValue(amount, years, randomRate);
>}
>>
>void DisplayProjecte dValue(double amount, int years, double rate)
>{
>double rateFraction = 1 + (rate/100);
>double finalAmount = amount * Math::Pow(rateF raction, years);
>finalAmount = Math::Round(fin alAmount, 2);
>Console::Write Line(S"--------------------------------------------");
>Console::Write Line(S"Investme nt Amount: ");
>Console::Write (amount);
>Console::Write Line(S"Growth Rate [%]: ");
>Console::Write (rate);
>Console::Write Line(S"Period [years]: ");
>Console::Write (years);
>Console::Write Line (S"Projected Final value of Investment: ");
>Console::Write (finalAmount);
>Console::Write Line(S"--------------------------------------------");
>}

>
Anil:
>
In C++, a definition or declaraion of a function must appear before it can
be used.
>
--
David Wilkinson
Visual C++ MVP

[Carl Daniel [VC++ MVP]]

Re: Function Overloading does not work?

Anil Gupte wrote:

That worked, but that is vey weird - seems like the good old linear
Fortran Programming days! Why should the position in a file have
anything to do with a function being recognized?

Because C, and subsequently C++ were defined to make it possible for the
compiler to pass over the source code 1 time.

>
Also, why does this line not generate at least a warning if not an
error?

It does generate an error - you already posted it.

>
DisplayProjecte dValue(amount, years, randomRate);
>
when randomRate is an int and the function is expecting a double?

You don't get an error for passing an int where a double is expected because
the conversion from int to double is implicit and lossless.

-cd

[Carl Daniel [VC++ MVP]]

Re: Function Overloading does not work?

Anil Gupte wrote:

I get two errors
void DisplayProjecte dValue(double amount, int years)
{
Random __gc * r = new Random();

Side note - this is based on the old "Managed Extensions for C++" introduced
with VC7, which are now deprecated. Get a newer book that covers "C++/CLI"
introduced with VC8, which is the going-forward solution for managed
programming in C++.

-cd