C# 学习之旅（3） --- 会说话的简易计算器

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using System.Speech;
 10 using System.Speech.Synthesis;
 11 
 12 
 13 namespace calculator
 14 {
 15     public partial class Form1 : Form
 16     {
 17         SpeechSynthesizer sp = new SpeechSynthesizer();
 18 
 19         public Form1()
 20         {
 21             InitializeComponent();
 22         }
 23         
 24         private void Add_Click(object sender, EventArgs e)
 25         {
 26             Compute compute = new Compute();
 27             compute.set(number1, number2);
 28             answer.Text = string.Format("{0}",compute.add());
 29             sp.SpeakAsync(answer.Text);
 30         }
 31 
 32         private void Subtract_Click(object sender, EventArgs e)
 33         {
 34             Compute compute = new Compute();
 35             compute.set(number1, number2);
 36             answer.Text = string.Format("{0}",compute.subtract());
 37             sp.SpeakAsync(answer.Text);
 38         }
 39 
 40         private void Multiply_Click(object sender, EventArgs e)
 41         {
 42             Compute compute = new Compute();
 43             compute.set(number1, number2);
 44             answer.Text = string.Format("{0}", compute.multiply());
 45             sp.SpeakAsync(answer.Text);
 46         }
 47 
 48         private void Divide_Click(object sender, EventArgs e)
 49         {
 50             Compute compute = new Compute();
 51             compute.set(number1, number2);
 52             answer.Text = string.Format("{0}", compute.divide());
 53             sp.SpeakAsync(answer.Text);
 54         }
 55 
 56         private void Power_Click(object sender, EventArgs e)
 57         {
 58             Compute compute = new Compute();
 59             compute.set(number1, number2);
 60             answer.Text = string.Format("{0}", compute.power());
 61             sp.SpeakAsync(answer.Text);
 62         }
 63 
 64         private void number1_TextChanged(object sender, EventArgs e)
 65         {
 66             string str = number1.Text.Trim();
 67 
 68             for (int i = 0; i < str.Length; i++)
 69             {
 70                 if (!Char.IsNumber(str[i]))
 71                 {
 72                     number1.Text = string.Empty;
 73                     number1.BackColor = Color.Red;
 74                 }
 75                 else
 76                 {
 77                     number1.BackColor = Color.Empty;
 78                 }
 79             }
 80         }
 81 
 82         private void number2_TextChanged(object sender, EventArgs e)
 83         {
 84             string str = number2.Text.Trim();
 85             for (int i = 0; i < str.Length; i++)
 86             {
 87                 if (!Char.IsNumber(str[i]))
 88                 {
 89                     number2.Text = string.Empty;
 90                     number2.BackColor = Color.Red;
 91                 }
 92                 else
 93                 {
 94                     number2.BackColor = Color.Empty;
 95                 }
 96             }
 97         }
 98 
 99     }
100 
101     class Compute {
102         private double a;
103         private double b;
104         private double x;
105 
106         public void set(object a, object b)
107         {
108             TextBox tempa = (TextBox)a;
109             TextBox tempb = (TextBox)b;
110             this.a = double.Parse(tempa.Text);
111             this.b = double.Parse(tempb.Text);
112         }
113 
114         public double add()
115         {
116             this.x = this.a + this.b;
117             return this.x;
118         }
119 
120         public double subtract()
121         {
122             this.x = this.a - this.b;
123             return this.x;
124         }
125 
126         public double multiply()
127         {
128             this.x = this.a * this.b;
129             return this.x;
130         }
131 
132         public double divide()
133         {
134             this.x = this.a / this.b;
135             return this.x;
136         }
137 
138         public double power()
139         {
140             this.x = Math.Pow(this.a, this.b);
141             return this.x;
142         }
143     }
144 }