作业4

1． 结对编程项目---四则运算 （10分）

基本功能要求：

1) 实现一个带有用户界面的四则运算。2) 生成的题目不能重复。3) 支持负数，例如-1，-1/2，-3‘4/5等。（达成）

需要支持的基本设定参数

1) 题目的数量  2) 数值的范围  3) 题目中最多几个运算符（目前没有达成）  4) 题目中或运算过程中有无有分数（比如进行整数除法的时候不能除尽） 5) 题目中是否有乘除法  6) 题目中是否有括号 （目前没有达成） 7) 题目中或运算过程中有无负数

学习感受：

本次作业难度较大，做的过程中遇到许多问题，通过本次作业，更加深入对组员的了解，也明白了编写过程中合作的重要性。

同组人：李云龙：http://www.cnblogs.com/liyunlong/

form1：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using 四则运算;

namespace _RandomNum
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public static int Count = 0;
        private int t = 60;
        public static int right = 0;

        private void button1_Click(object sender, EventArgs e)
        {
            label2.Text = t.ToString();
            timer1.Enabled = true;
            timer1.Interval = 1000;
            timer1.Start();
        }

        private void RDN()
        {
            Random rd = new Random();
            int r1, r2;
            if (textBox2.Text == "" && textBox3.Text == "")
            {
                MessageBox.Show("请输入取值范围!");
                return;
            }
            r1 = rd.Next(int.Parse(textBox2.Text), int.Parse(textBox3.Text));
            r2 = rd.Next(int.Parse(textBox2.Text), int.Parse(textBox3.Text));
            textBox1.Text = r1.ToString();
            textBox2.Text = r2.ToString();
            string[] fuhao = new string[] { "＋", "－", "×", "÷" };
            label3.Text = fuhao[rd.Next(0, 5)];
            int result = 0;
            switch (label3.Text)
            {
                case "＋":
                    result = int.Parse(textBox4.Text) + int.Parse(textBox5.Text);
                    return;
                case "－":
                    if (int.Parse(textBox4.Text) >= int.Parse(textBox5.Text))
                    {
                        result = int.Parse(textBox4.Text) - int.Parse(textBox5.Text);
                    }
                    else
                    {
                        MessageBox.Show("请回车进行下一题！此题不计入答题总数！");
                    }
                    return;
                case "×":
                    result = int.Parse(textBox5.Text) * int.Parse(textBox6.Text);
                    return;
                case "÷":
                    if (textBox5.Text == "0")
                    {
                        MessageBox.Show("分母为0,不计入答题总数,请回车继续答题！");
                    }
                    else
                    {
                        result = int.Parse(textBox5.Text) / int.Parse(textBox6.Text);
                    }
                    return;
            }
        }

        private void RandomNum()
        {
            Random ran = new Random();
            int n1, n2;
            if (textBox2.Text == "" && textBox3.Text == "")
            {
                MessageBox.Show("请输入取值范围!");
                return;
            }
            n1 = ran.Next(int.Parse(textBox2.Text), int.Parse(textBox3.Text));
            n2 = ran.Next(int.Parse(textBox2.Text), int.Parse(textBox3.Text));
            textBox1.Text = n1.ToString();
            textBox2.Text = n2.ToString();
            textBox3.Text = "";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {

        }

        private void button10_Click(object sender, EventArgs e)
        {
            timer1.Stop();
            Form2 frm2 = new Form2();
            frm2.ShowDialog();
        }

        private void textBox3_KeyDown(object sender, KeyEventArgs e)
        {
            int result = 0;
            string s = label3.Text;
            if (Count == int.Parse(textBox6.Text))
            {
                Form2 frm2 = new Form2();
                frm2.ShowDialog();
            }
            switch (s)
            {
                case "＋":
                    result = int.Parse(textBox1.Text) + int.Parse(textBox2.Text);
                    break;
                case "－":
                    if (int.Parse(textBox1.Text) >= int.Parse(textBox2.Text))
                    {
                        result = int.Parse(textBox1.Text) - int.Parse(textBox2.Text);
                    }
                    else
                    {
                        MessageBox.Show("请回车进行下一题！此题不计入答题总数！");
                    }
                    break;
                case "×":
                    result = int.Parse(textBox1.Text) * int.Parse(textBox2.Text);
                    break;
                case "÷":
                    if (textBox2.Text == "0")
                    {
                        MessageBox.Show("分母为0,不计入答题总数,请回车继续答题！");
                    }
                    else
                    {
                        result = int.Parse(textBox1.Text) / int.Parse(textBox2.Text);
                    }
                    break;
            }
            if (e.KeyCode == Keys.Enter)
            {
                if (textBox3.Text == result.ToString())
                {
                    right++;
                    Count++;
                    MessageBox.Show("回答正确！");
                }
                else
                {
                    if (textBox2.Text == "0" || int.Parse(textBox1.Text) - int.Parse(textBox2.Text) < 0)
                    {
                        RandomNum();
                    }
                    else
                    {
                        MessageBox.Show("答题错误！");
                        RandomNum();
                        Count++;
                    }
                }
                RandomNum();
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            label7.Text = button1.Text;
            RandomNum();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            label7.Text = button2.Text;
            RandomNum();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            label7.Text = button3.Text;
            RandomNum();
        }

        private void button6_Click(object sender, EventArgs e)
        {
            label7.Text = button4.Text;
            RandomNum();
        }
    }
}

form2：

using _RandomNum;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 四则运算
{
  
        public partial class Form2 : Form
     {
        public Form2()
      {
           InitializeComponent();
        }

       private void Form2_Load(object sender, EventArgs e)
        {
             textBox1.Text = Form1.Count.ToString();
            textBox2.Text = Form1.right.ToString();
            textBox3.Text = (Form1.Count - Form1.right).ToString();
         }

    }
    
}

程序截图：