A 5 Function Calculator

#include <iostream.h>
#include <conio.h>
float inputOne, inputTwo, answer;
char operator_, yn;
int main()
{
	textcolor(LIGHTGREEN);
	while (yn != 'n')
	{
		clrscr();
		cout << "First number + - / * ^ second number\n";
		cin >> inputOne >> operator_ >> inputTwo;
		if (operator_ == '+')
			answer = inputOne + inputTwo;
		if (operator_ == '-')
			answer = inputOne - inputTwo;
		if (operator_ == '*')
			answer = inputOne * inputTwo;
		if (operator_ == '/')	 	 	 
			{
			if (inputTwo == 0)
				{
				cout << "Cannot divide by 0";
				}
			else	
				answer = inputOne / inputTwo;
			}
		if (operator_ == '^')
			{
			answer = inputOne;
			for (int i=2; i<=inputTwo; i++)
				answer = answer * inputOne;
			}
		cout << endl;
		cout << inputOne << " " << operator_ << " ";
		cout << inputTwo << " = " << answer;
		cout << "\n\nSolve another? <yn> ";
		cin >> yn;
		cout << "\n";	 
	}
	return 0;
}
<p><b>Free Threading</b></p>
<p>For the first time, VB.NET has given VB developers the ability to write truly 
 freethreaded<br>
 applications. If your application is going to perform a task that could take 
 a<br>
 long time, such as parsing through a large recordset or performing a complex 
 series<br>
 of mathematical calculations, you can push that processing off to its own thread 
 so<br>
 that the rest of your application is still accessible. In VB6, the best you 
 could do to<br>
 keep the rest of the application from appearing to be locked was to use the 
 DoEvents<br>
 method.</p>
<p>Examine this code, which is written for VB.NET. Here you have some code for<br>
 button1. This code calls the BeBusy routine, which has a loop in it to just 
 to take up<br>
 time. However, while in this loop, you are consuming the thread for this application,<br>
 and the UI will not respond while the loop is running. </p>
<p>Open a new VB project. Add a button.</p>
<p><font color="#3366FF">Private Sub</font> button1_Click(<font color="#3366FF">ByVal</font> 
 sender <font color="#3366FF">As</font> System.Object, _<br>
 &nbsp;&nbsp;<font color="#3366FF">ByVal</font> e <font color="#3366FF">As</font> 
 System.EventArgs) <font color="#3366FF">Handles</font> button1.Click<br>
 &nbsp;&nbsp;BeBusy()<br>
 End Sub<br>
 <br>
 <font color="#3366FF">Sub</font> BeBusy()<br>
 <font color="#3366FF">Dim</font> i <font color="#3366FF">As Decimal</font><br>
 &nbsp;&nbsp;<font color="#3366FF">For</font> i = 1 <font color="#3366FF">To</font> 
 20000000<br>
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<font color="#009933">&#145;do nothing but 
 tie up app</font><br>
 &nbsp;&nbsp;<font color="#3366FF">Next</font><br>
 &nbsp;&nbsp;Beep()<br>
 End Sub </p>
<p>To create a thread, you must use the System.Threading.Thread class.</p>
<p><font color="#3366FF">Imports</font> System.Threading.Thread<br>
</p>
<p>To fix the code and keep BeBusy from consuming the main program thread, you 
 have<br>
 now created a new thread and will run BeBusy on that thread. However, that line 
 of<br>
 code isn&#146;t enough. Next, you must call the Start method on that new thread. 
 With<br>
 VB.NET, calling BeBusy on its own thread would look like this:<br>
 <br>
 <font color="#3366FF">Private Sub</font> button1_Click(<font color="#3366FF">ByVal</font> 
 sender <font color="#3366FF">As</font> System.Object, _<br>
 &nbsp;&nbsp;<font color="#3366FF">ByVal</font> e <font color="#3366FF">As</font> 
 System.EventArgs) Handles button1.Click<br>
 &nbsp;&nbsp;<br>
 &nbsp;&nbsp; <font color="#FFFFFF">'<font color="#009933">Creatre a new thread</font></font><br>
 &nbsp;&nbsp;<font color="#3366FF">Dim</font> busyThread <font color="#3366FF">As 
 New </font>System.Threading.Thread(<font color="#3366FF">AddressOf</font> BeBusy)<br>
 &nbsp;&nbsp;busyThread.Start()<br>
 End Sub </p>