// the public method called by the driver
public double DoSum(int theValue)
{
if (theComputer == null)
{
GenerateCode(theValue);
}
return(theComputer.ComputeSum());
}
// check if the interface is null
// if so, call Setup.
public double DoSum(int theValue)
{
if (theComputer == null)
{
GenerateCode(theValue);
}
// call the method through the interface
return(theComputer.ComputeSum());
}