Variables

Floating point would probably be best for a real application, but, to simplify things let us:

• Convert the input string to an int variable.
• Evaluate the formula using integer arithmetic.
• Save the result as an int variable.

This work will by done by the convert() method. Here is a sketch of the code:

// The application
public int convert( int F )  
{
  return ( (F-32) * 5 ) / 9;
}

You could continue on from here and develop a non-GUI application that uses the command line window for input and output. You might do this to debug the application code before working on the GUI. However, this example does I/O with GUI components.