public class ScientificCalculator : Calculator
{
public void SquareRoot()
{
double root = Math.Sqrt(CurrentValue);
Clear();
Add(root);
}
}

public class Calculator
{
private double currentValue;
public double CurrentValue
{
get
{
return currentValue;
}
}

public void Add(double addValue)
{
currentValue += addValue;
}

public void Subtract(double subValue)
{
currentValue -= subValue;
}

public void Multiply(double multValue)
{
currentValue *= multValue;
}

public void Divide(double divValue)
{
currentValue /= divValue;
}

public void Clear()
{
currentValue = 0;
}

}
void Page_Load()
{
ScientificCalculator MyCalc = new ScientificCalculator();
Response.Write("<b>Created a new ScientificCalculator object.</b><br/>");

Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.Add(23);
Response.Write("<br/><b>Added 23 - MyCalc.Add(23)</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.Subtract(7);
Response.Write("<br/><b>Subtracted 7 - MyCalc.Subtract(7)</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.Multiply(3);
Response.Write("<br/><b>Multiplied by 3 - MyCalc.Multiply(3)</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.Divide(4);
Response.Write("<br/><b>Divided by 4 - MyCalc.Divide(4)</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.SquareRoot();
Response.Write("<br/><b>Square root - MyCalc.SquareRoot()</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);

MyCalc.Clear();
Response.Write("<br/><b>Cleared - MyCalc.Clear()</b><br/>");
Response.Write("Current Value = " + MyCalc.CurrentValue);
}

自己寫的另一個例子。

public class SCICALCULATOR : CALCULATOR
{

public void MULT(double multvalue)
{
currentvalue*=multvalue;
}
}



public class CALCULATOR
{
public double currentvalue;
public void Add(double addvalue)
{
currentvalue+=addvalue;
}
public void Subtract(double subtract)
{
currentvalue-=subtract;
}
public void Clear()
{
currentvalue=0;
}
}

void Page_Load()
{
SCICALCULATOR mycal=new SCICALCULATOR();
mycal.Add(60);
Response.Write(mycal.currentvalue);
mycal.Subtract(50);
Response.Write("<br>");
Response.Write(mycal.currentvalue);
Response.Write("<hr/>");
mycal.Clear();
mycal.MULT(50);

Response.Write(mycal.currentvalue);

}