/// <summary>
/// Perform subtraction and store operation in history.
/// </summary>
public void Subtraction()
{
DisplayNumber = FirstOperand - SecondOperand;
OperationsHistory.Insert(0, string.Format(FirstOperand + " - " +
SecondOperand + " =\n" + DisplayNumber + "\n\n"));
FirstOperand = DisplayNumber;
}
/// <summary>
/// Perform multiplication and store operation in history.
/// </summary>
public void Multiplication()
{
DisplayNumber = FirstOperand * SecondOperand;
OperationsHistory.Insert(0, string.Format(FirstOperand +
" \u00d7 " + SecondOperand + " =\n" +
DisplayNumber + "\n\n"));
FirstOperand = DisplayNumber;
}
/// <summary>
/// Perform division and store operation in history.
/// </summary>
public void Division()
{
DisplayNumber = FirstOperand / SecondOperand;
OperationsHistory.Insert(0, string.Format(FirstOperand +
" \u00f7 " + SecondOperand + " =\n" + DisplayNumber +
"\n\n"));
FirstOperand = DisplayNumber;
}