/// <summary>
 /// 除号
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btnDivide_Click(object sender, RoutedEventArgs e)
 {
     if (Calculator.IsFirstNumber(tbkAssistantOperationFrame.Text)) //当副计算框为空时
     {
         if (Calculator.IsOperator(tbkMainOperationFrame.Text))     //当主计算框中包含此运算符时
         {
             if (tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 1].ToString() != CalculatorInfo.Divide)
             {
                 string temp = tbkMainOperationFrame.Text.Remove(-1);
                 tbkMainOperationFrame.Text = temp + CalculatorInfo.Divide;
             }
             else
             {
                 return;
             }
         }
         if (tbkMainOperationFrame.Text == "0")//当主运算框中的文本为“0”时
         {
             info.FirstNumber           = "0";
             tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Divide;
         }
         else//当主运算框中的文本不为“0”时
         {
             tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Divide;
         }
     }
     else //当副计算框不为空时
     {
         if (Calculator.IsOperator(tbkMainOperationFrame.Text))//当主计算框中一包含此运算符时
         {
             if (tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 1].ToString() != CalculatorInfo.Multiple)
             {
                 string temp = tbkMainOperationFrame.Text.Remove(-1);
                 tbkMainOperationFrame.Text = temp + CalculatorInfo.Multiple;
             }
             else
             {
                 return;
             }
         }
         else
         {
             if (Calculator.IsOperator(tbkMainOperationFrame.Text))
             {
                 tbkMainOperationFrame.Text = tbkMainOperationFrame.Text.Remove(-1);
             }
             string temp = tbkAssistantOperationFrame.Text + tbkMainOperationFrame.Text;
             if (temp.Contains(CalculatorInfo.Plus))
             {
                 this.tbkAssistantOperationFrame.Text = info.FirstNumber.ToString() + CalculatorInfo.Plus + info.SecondNumber.ToString();
                 info.FirstNumber = (Convert.ToDouble(info.FirstNumber) + Convert.ToDouble(info.SecondNumber)).ToString();
                 this.tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Plus;
             }
             if (temp.Contains(CalculatorInfo.Subtract))
             {
                 this.tbkAssistantOperationFrame.Text = info.FirstNumber.ToString() + CalculatorInfo.Subtract + info.SecondNumber.ToString();
                 info.FirstNumber = (Convert.ToDouble(info.FirstNumber) - Convert.ToDouble(info.SecondNumber)).ToString();
                 this.tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Subtract;
             }
             if (temp.Contains(CalculatorInfo.Multiple))
             {
                 this.tbkAssistantOperationFrame.Text = info.FirstNumber.ToString() + CalculatorInfo.Multiple + info.SecondNumber.ToString();
                 info.FirstNumber = (Convert.ToDouble(info.FirstNumber) * Convert.ToDouble(info.SecondNumber)).ToString();
                 this.tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Multiple;
             }
             if (temp.Contains(CalculatorInfo.Divide))
             {
                 this.tbkAssistantOperationFrame.Text = info.FirstNumber.ToString() + CalculatorInfo.Divide + info.SecondNumber.ToString();
                 info.FirstNumber = (Convert.ToDouble(info.FirstNumber) / Convert.ToDouble(info.SecondNumber)).ToString();
                 this.tbkMainOperationFrame.Text = info.FirstNumber + CalculatorInfo.Divide;
             }
         }
     }
 }
        /// <summary>
        /// 数字 0 的点击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnZero_Click(object sender, RoutedEventArgs e)
        {
            if (Calculator.IsFirstNumber(tbkAssistantOperationFrame.Text)) //当副计算框为空时
            {
                if (Calculator.IsOperator(tbkMainOperationFrame.Text))     //当主计算框中包含此运算符时
                {
                    if (this.tbkMainOperationFrame.Text.Length >= 3 && this.tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 1].ToString() == "0" && Calculator.IsOperator(tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 2].ToString()))
                    {
                        return;
                    }
                    else
                    {
                        tbkAssistantOperationFrame.Text = tbkMainOperationFrame.Text;
                        info.SecondNumber         += "0";
                        tbkMainOperationFrame.Text = info.SecondNumber;
                    }
                }
                else//当主计算框中不包含此运算符时
                {
                    if (tbkMainOperationFrame.Text == "0")
                    {
                        return;
                    }
                    else
                    {
                        info.FirstNumber          += "0";
                        tbkMainOperationFrame.Text = info.FirstNumber;
                    }
                }
            }
            else//当副计算框不为空时
            {
                if (Calculator.IsOperator(tbkMainOperationFrame.Text))//当主计算框中包含此运算符时
                {
                    if (this.tbkMainOperationFrame.Text.Length >= 3 && this.tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 1].ToString() == "0" && Calculator.IsOperator(tbkMainOperationFrame.Text[tbkMainOperationFrame.Text.Length - 2].ToString()))
                    {
                        return;
                    }
                    else
                    {
                        tbkAssistantOperationFrame.Text = tbkMainOperationFrame.Text;
                        info.SecondNumber          = "0";
                        tbkMainOperationFrame.Text = info.SecondNumber;
                    }
                }

                else//当主计算框中不包含此运算符时
                {
                    if (tbkMainOperationFrame.Text == "0")
                    {
                        return;
                    }
                    else
                    {
                        info.SecondNumber         += "0";
                        tbkMainOperationFrame.Text = info.SecondNumber;
                    }
                }
            }
        }