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20160929-四则运算

2024-08-16 10:41:25   226人阅读

结对伙伴:杜桥

结对项目:四则运算

版本控制:

HTTPS:https://git.coding.net/li_yuhuan/CalculateTest.git

SSH:git@git.coding.net:li_yuhuan/CalculateTest.git

GIT:git://git.coding.net/li_yuhuan/CalculateTest.git

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在原solution中新建了一个winForm的project,add reference添加之前的控制台版本project,就可以调用写好的方法.

winform界面设计为:

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        private void Form1_Load(object sender, EventArgs e)        {            ReadXml();            CreateExpressionAndResult();        }        protected override void OnClosing(CancelEventArgs e)        {            SaveXml();            base.OnClosing(e);        }

启动程序时从xml文件中读取数据,设置用户名,难度,题数等显示;

关闭程序时将数据保存到xml文件.

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        private void SaveXml()        {            XmlDocument xmlDoc = new XmlDocument();            xmlDoc.Load(AppDomain.CurrentDomain.BaseDirectory + "Setting.xml");            xmlDoc.RemoveAll();            XmlElement xe = xmlDoc.CreateElement("saveData");            xe.SetAttribute("userName", m_userName);            xe.SetAttribute("difficulty", m_difficulty);            xe.SetAttribute("totalCount", m_totalCount.ToString());            xe.SetAttribute("correctCount", m_correctCount.ToString());            xmlDoc.AppendChild(xe);            xmlDoc.Save(AppDomain.CurrentDomain.BaseDirectory + "Setting.xml");        }        private void ReadXml()        {            XmlDocument xmlDoc = new XmlDocument();            xmlDoc.Load(AppDomain.CurrentDomain.BaseDirectory + "Setting.xml");            XmlElement xe = (XmlElement)xmlDoc.SelectSingleNode("saveData");            m_userName = xe.GetAttribute("userName");            m_difficulty = xe.GetAttribute("difficulty");            m_totalCount = int.Parse(xe.GetAttribute("totalCount"));            m_correctCount = int.Parse(xe.GetAttribute("correctCount"));            m_wrongCount = m_totalCount - m_correctCount;        }

读取和写入xml文件的方法

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        private void CreateExpressionAndResult()        {            m_expression = CalculateTest.Program.CreateExpression(m_difficulty);            label1.Text = m_expression + " = ";            m_result = CalculateTest.Program.Calculate(m_expression);           }

用旧项目中的方法生成表达式并计算出结果;

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        private void button1_Click(object sender, EventArgs e)        {            string messageText;            if (resultInput.Text == m_result.ToString())            {                messageText = "回答正确！";                m_correctCount++;            }            else            {                messageText = "回答错误！正确答案是 " + m_result.ToString() ;                m_wrongCount++;            }            m_totalCount++;            DialogResult dr = MessageBox.Show(messageText, "提示：");            if (dr == DialogResult.OK)            {                CreateExpressionAndResult();                resultInput.Text = "";            }        }

弹出提示显示回答是否正确,并更新总答题数,正确题数,错误题数,清空input并出下一题.

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        string m_userName        {            get            {                return userNameLabel.Text;            }            set            {                userNameLabel.Text = value;            }        }        string m_difficulty        {            get            {                return difficultyLabel.Text;            }            set            {                difficultyLabel.Text = value;            }        }        int m_totalCount        {            get            {                return int.Parse(totalCountLabel.Text);            }            set            {                totalCountLabel.Text = value.ToString();            }        }        int m_correctCount        {            get            {                return int.Parse(correctCountLabel.Text);            }            set            {                correctCountLabel.Text = value.ToString();            }        }        int m_wrongCount        {            get            {                return int.Parse(wrongCountLabel.Text);            }            set            {                wrongCountLabel.Text = value.ToString();            }        }

通过对变量赋值来更新界面上显示的内容;

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题目难度设计分为Easy,Normal,Difficult三个等级,均为四个数字进行运算;

Easy:只有加减法且无括号;

Normal:包含加减乘除,无括号;

Difficult:包含加减乘除,有括号;

static public string CreateExpression(string difficulty)

原方法新增参数string difficulty根据难度生成表达式;

 

            if (difficulty == "Easy")            {                oplist = new List<char>() { ‘+‘, ‘-‘, ‘+‘, ‘-‘ };            }            else            {                oplist = new List<char>() { ‘+‘, ‘-‘, ‘*‘, ‘/‘ };            }

如果是简单,则符号列表里只有加减号,其余则为加减乘除四种;

 

            if (difficulty == "Difficult")            {                int pos;                index = expList.IndexOf("/");                if (-1 == index)                {                    pos = position[ran.Next(3)];                }                else                {                    if (1 == index)                    {                        position.RemoveAt(1);                    }                    else if (3 == index)                    {                        position.RemoveAt(2);                    }                    pos = position[ran.Next(position.Count())];                }                expList.Insert(pos, "(");                expList.Insert(pos + 4, ")");            }

只有在难度为difficult的时候选择位置插入括号

20160929-四则运算


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