C# 学习之旅（3） --- 会说话的简易计算器

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Speech;
using System.Speech.Synthesis;


namespace calculator
{
    public partial class Form1 : Form
    {
        SpeechSynthesizer sp = new SpeechSynthesizer();

        public Form1()
        {
            InitializeComponent();
        }
        
        private void Add_Click(object sender, EventArgs e)
        {
            Compute compute = new Compute();
            compute.set(number1, number2);
            answer.Text = string.Format("{0}",compute.add());
            sp.SpeakAsync(answer.Text);
        }

        private void Subtract_Click(object sender, EventArgs e)
        {
            Compute compute = new Compute();
            compute.set(number1, number2);
            answer.Text = string.Format("{0}",compute.subtract());
            sp.SpeakAsync(answer.Text);
        }

        private void Multiply_Click(object sender, EventArgs e)
        {
            Compute compute = new Compute();
            compute.set(number1, number2);
            answer.Text = string.Format("{0}", compute.multiply());
            sp.SpeakAsync(answer.Text);
        }

        private void Divide_Click(object sender, EventArgs e)
        {
            Compute compute = new Compute();
            compute.set(number1, number2);
            answer.Text = string.Format("{0}", compute.divide());
            sp.SpeakAsync(answer.Text);
        }

        private void Power_Click(object sender, EventArgs e)
        {
            Compute compute = new Compute();
            compute.set(number1, number2);
            answer.Text = string.Format("{0}", compute.power());
            sp.SpeakAsync(answer.Text);
        }

        private void number1_TextChanged(object sender, EventArgs e)
        {
            string str = number1.Text.Trim();

            for (int i = 0; i < str.Length; i++)
            {
                if (!Char.IsNumber(str[i]))
                {
                    number1.Text = string.Empty;
                    number1.BackColor = Color.Red;
                }
                else
                {
                    number1.BackColor = Color.Empty;
                }
            }
        }

        private void number2_TextChanged(object sender, EventArgs e)
        {
            string str = number2.Text.Trim();
            for (int i = 0; i < str.Length; i++)
            {
                if (!Char.IsNumber(str[i]))
                {
                    number2.Text = string.Empty;
                    number2.BackColor = Color.Red;
                }
                else
                {
                    number2.BackColor = Color.Empty;
                }
            }
        }

    }

    class Compute {
        private double a;
        private double b;
        private double x;

        public void set(object a, object b)
        {
            TextBox tempa = (TextBox)a;
            TextBox tempb = (TextBox)b;
            this.a = double.Parse(tempa.Text);
            this.b = double.Parse(tempb.Text);
        }

        public double add()
        {
            this.x = this.a + this.b;
            return this.x;
        }

        public double subtract()
        {
            this.x = this.a - this.b;
            return this.x;
        }

        public double multiply()
        {
            this.x = this.a * this.b;
            return this.x;
        }

        public double divide()
        {
            this.x = this.a / this.b;
            return this.x;
        }

        public double power()
        {
            this.x = Math.Pow(this.a, this.b);
            return this.x;
        }
    }
}

看到这里您辛苦了，谢谢 : )

—————————————————————————————————————————————————————————————————————————————

声明：

　　本文为 大Yi巴狼 对自己所学的知识整理和实现。

　　本文档欢迎自由转载，但请务必保持本文档完整或注明来之本文档。本文档未经 大Yi巴狼 同意，不得用于商业用途。最后，如果您能从这个简单文档里获得些许帮助，大Yi巴狼 将对自己的一点努力感到非常高兴；由于作者本人水平有限，如果本文档中包含的错误给您造成了不便，在此提前说声抱歉。

　　祝身体健康，工作顺利。