/// <summary>
/// 运算符优先级比较
/// </summary>
/// <param name="optA">运算符类型A</param>
/// <param name="optB">运算符类型B</param>
/// <returns>A与B相比，-1，低；0,相等；1，高</returns>
public static int ComparePriority(OperatorTypes optA, OperatorTypes optB)
{
if (optA == optB)
{
//A、B优先级相等
return 0;
}
//乘,除,余(*,/,%)
if ((optA >= OperatorTypes.MUL && optA <= OperatorTypes.MOD) &&
(optB >= OperatorTypes.MUL && optB <= OperatorTypes.MOD))
{
return 0;
}
//加,减(+,-)
if ((optA >= OperatorTypes.ADD && optA <= OperatorTypes.SUB) &&
(optB >= OperatorTypes.ADD && optB <= OperatorTypes.SUB))
{
return 0;
}
//小于,小于或等于,大于,大于或等于(<,<=,>,>=)
if ((optA >= OperatorTypes.LT && optA <= OperatorTypes.GE) &&
(optB >= OperatorTypes.LT && optB <= OperatorTypes.GE))
{
return 0;
}
//等于,不等于(=,<>)
if ((optA >= OperatorTypes.ET && optA <= OperatorTypes.UT) &&
(optB >= OperatorTypes.ET && optB <= OperatorTypes.UT))
{
return 0;
}
//三角函数
if ((optA >= OperatorTypes.TAN && optA <= OperatorTypes.ATAN) &&
(optB >= OperatorTypes.TAN && optB <= OperatorTypes.ATAN))
{
return 0;
}
if (optA < optB)
{
//A优先级高于B
return 1;
}
//A优先级低于B
return -1;
}
public Operator(OperatorTypes type, string value)
{
this.Type = type;
this.Value = value;
}
/// <summary>
/// Handle click event on the addition button to perform an addition operation
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Add_Click(object sender, RoutedEventArgs e)
{
currentOperation = OperatorTypes.Addition;
isNewNumber = true;
}
/// <summary>
/// Handle click event on the substraction button to perform an substraction operation
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Subtract_Click(object sender, RoutedEventArgs e)
{
currentOperation = OperatorTypes.Subtraction;
isNewNumber = true;
}
/// <summary>
/// Handle click event on the multiplication button to perform an multiplication operation
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Multiply_Click(object sender, RoutedEventArgs e)
{
currentOperation = OperatorTypes.Multiplication;
isNewNumber = true;
}
/// <summary>
/// Handle click event on the equals button to perform the operation in course
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Equals_Click(object sender, RoutedEventArgs e)
{
operands.Add(DisplayNumber);
switch (currentOperation)
{
case OperatorTypes.Addition:
DisplayNumber = SumOperands();
break;
case OperatorTypes.Subtraction:
DisplayNumber = SubstractOperands();
break;
case OperatorTypes.Multiplication:
DisplayNumber = MultiplyOperands();
break;
case OperatorTypes.Division:
DisplayNumber = DivideOperands();
break;
default:
break;
}
isNewNumber = true;
currentOperation = OperatorTypes.None;
operands.Clear();
}
/// <summary>
/// Handle click event on the division button to perform an division operation
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Divide_Click(object sender, RoutedEventArgs e)
{
currentOperation = OperatorTypes.Division;
isNewNumber = true;
}
