One of those trick questions

[Michael C]

without running it what will this code do. It compiles correctly.

private void X()
{
int i = 0;
{
i++;
MessageBox.Show(i.ToString());
} while(i < 10);
MessageBox.Show("Done");
}

[Maqsood Ahmed]

Hello,
The loop should look like as follows:

do
{
i++;
MessageBox.Show(i.ToString());
}while(i < 10);

OR:

while(i < 10)
{
i++;
MessageBox.Show(i.ToString());
}

HTH. Cheers
Maqsood Ahmed [MCP,C#]
Kolachi Advanced Technologies
http://www.kolachi.net

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[Maqsood Ahmed]

Hello,
The loop should look like as follows:

do
{
i++;
MessageBox.Show(i.ToString());
}while(i < 10);

OR:

while(i < 10)
{
i++;
MessageBox.Show(i.ToString());
}

HTH. Cheers
Maqsood Ahmed [MCP,C#]
Kolachi Advanced Technologies
http://www.kolachi.net

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[geoffblanduk_nospam]

OK as a guess without compiling...
i is set to 0.
i is incremented to 1.
Message box shown with "1".
while loop counts to 9.
Message box shown with "Done".

Michael C wrote:

without running it what will this code do. It compiles correctly.

private void X()
{
int i = 0;
{
i++;
MessageBox.Show(i.ToString());
} while(i < 10);
MessageBox.Show("Done");
}

[Maqsood Ahmed]

Hello,
No, MessageBox will show 1, then application will freeze as 'i' never
gets incremented after the while statement (there is a semi-colon after
'while' and 'do' is absent). And it'll never display "Done" :)
Bye!!

Maqsood Ahmed [MCP,C#]
Kolachi Advanced Technologies
http://www.kolachi.net

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[Tom Porterfield]

On Fri, 20 May 2005 16:31:02 +1000, Michael C wrote:

without running it what will this code do. It compiles correctly.

private void X()
{
int i = 0;
{
i++;
MessageBox.Show(i.ToString());
} while(i < 10);
MessageBox.Show("Done");
}

Without compiling and running, my guess is

i gets set to 0
i gets incremented to 1
A message box is displayed showing 1
i < 10 gets evaluated to true, but since you close the loop immediately
with a semicolon, there is no behavioral impact
A message box is displayed showing Done

For a while loop, the loop code follows while. You could also use
do...while, in which case the do goes at the beginning.
--
Tom Porterfield

[Willy Denoyette [MVP]]

"Tom Porterfield" <tp******@mvps.org> wrote in message
news:93***************@tpportermvps.org...

On Fri, 20 May 2005 16:31:02 +1000, Michael C wrote:

without running it what will this code do. It compiles correctly.

private void X()
{
int i = 0;
{
i++;
MessageBox.Show(i.ToString());
} while(i < 10);
MessageBox.Show("Done");
}

Without compiling and running, my guess is

i gets set to 0
i gets incremented to 1
A message box is displayed showing 1
i < 10 gets evaluated to true, but since you close the loop immediately
with a semicolon, there is no behavioral impact
A message box is displayed showing Done

Not at all, the while loop never ends as i is never incremented, you just
peg the CPU in an endless loop.

Willy.

[Tom Porterfield]

On Fri, 20 May 2005 13:04:42 +0200, Willy Denoyette [MVP] wrote:

Not at all, the while loop never ends as i is never incremented, you just
peg the CPU in an endless loop.

Quite right. Thanks.
--
Tom Porterfield