C#代码 课后习题代码.doc

第1章 ：习题一、 习题二 using System; using System.Collections.Generic; namespace WindowsFormsApplication2 using System.Linq;using System.Text; public Form1()InitializeComponent();namespace ConsoleApplication1 private void button1_Click(object sender, EventArgs e)class Program label1.Font =new Font(华文彩云,80);static void Main(string args) label1.ForeColor=System.Drawing.Color.Blue; Console.WriteLine(Hello World!); button1.Enabled=false; Console.Read(); 第二章 习题二 private void button1_Click(object sender, EventArgs e) String s, a; s = Convert.ToString(textBox1.Text); a = s.ToUpper(); textBox1.Text = a.ToString(); private void button2_Click(object sender, EventArgs e) String s, a; s = Convert.ToString(textBox1.Text); a = s.ToLower();textBox1.Text = a.ToString(); 习题六 private void button1_Click(object sender, EventArgs e) string a; a = Convert.ToString(textBox1.Text); MessageBox.Show(Convert.ToString(a)+,欢迎进入C#的世界！, 欢迎进入C#的世界！, MessageBoxButtons.OK, MessageBoxIcon.Information); 习题三 private void button1_Click(object sender, EventArgs e) int a, b, c, d, x; x = Convert.ToInt32(textBox1.Text); a = x/1000; b = x/100-a*10; c = x/10-a*100-b*10; d = x%10; textBox2.Text=Convert.ToString(a); textBox3.Text= Convert.ToString(b); textBox4.Text=Convert.ToString(c); textBox5.Text=Convert.ToString(d); 习题四银行贷款的月还额 private void button1_Click(object sender, EventArgs e) double p, r, a, b; int n; p = Convert.ToDouble(textBox1.Text); r = Convert.ToDouble(textBox2.Text); n = Convert.ToInt32(textBox3.Text); b = Math.Pow(1 + r), n); a = p * r * b / (b - 1); textBox4.Text = a.ToString(.#); 习题五、随机数 private void button1_Click(object sender, EventArgs e) Random intra = new Random(); int a=intra.Next(1, 101); char b = (char)a; textBox1.Text = Convert.ToString(a); textBox2.Text = Convert.ToString(b); 第三章 习题二是否是闰年 private void button1_Click(object sender, EventArgs e) int a; a=Convert.ToInt32(textBox1.Text); if (a % 4 = 0 & a % 100 != 0 | a % 400 = 0) label2.Text = 闰年; else label2.Text = 不是闰年; 习题三一元二次方程组 private void button1_Click(object sender, EventArgs e) int a, b, c;double x; a = Convert.ToInt32(textBox1.Text); b = Convert.ToInt32(textBox2.Text); c = Convert.ToInt32(textBox3.Text); x=Math.Pow(b,2); if (a = 0) abel4.Text = 不是一元二次方程; else if (x - 4 * a * c = 0) label4.Text = 有两个相等的实根; else if (x - 4 * a * c 0) label4.Text = 有两个不等的实根; else label4.Text = 无解; 习题四 private void button1_Click(object sender, EventArgs e) double a, b, c, m, s; a = Convert.ToDouble(textBox1.Text); b = Convert.ToDouble(textBox2.Text); c = Convert.ToDouble(textBox3.Text); m = (a + b + c) / 2; if (a 0 & b 0 & c 0) if (a + b c & a + c b &b + c a) s = Math.Sqrt(m * (m - a) * (m - b) * (m - c); label4.Text = 三角形面积为 + s; else MessageBox.Show(输入错误, 提示, MessageBoxButtons.OK, MessageBoxIcon.Exclamation); label4.Text = ; else MessageBox.Show(输入错误, 提示, MessageBoxButtons.OK, MessageBoxIcon.Exclamation); label4.Text = ; 习题一、 private void button1_Click(object sender, EventArgs e) int a, b, c, max, min; a = Convert.ToInt32(textBox1.Text); b = Convert.ToInt32(textBox2.Text); c = Convert.ToInt32(textBox3.Text); max = (a b ? a : b) c ? (a b ? a : b) : c; min = (a b ? a : b) c ? (a b ? a : b) : c; b = a + b + c - max - min; label5.Text = max+,+b+,+min; 第4章 习题三private void button1_Click(object sender, EventArgs e) int s=0; for(int i=1;i=100;i+) for (int j = 0; j = i; j+) s = s + j; textBox1.Text = Convert.ToString(s); private void button1_Click(object sender, EventArgs e) int s = 0,u=0; for (int i = 1; i = 100; i+) u=u+i-1; s = s+u+i; textBox1.Text = Convert.ToString(s); 习题五、3和7的倍数private void button1_Click(object sender, EventArgs e) for (int i = 1; i = 100; i+) if (i % 3 = 0 & i % 7 = 0) textBox1.Text = textBox1.Text + rn + Convert.ToString(i); 习题一 private void button1_Click(object sender, EventArgs e) int s=0; for (int i = 1; i = 100; i+) s = s + i; textBox1.Text = Convert.ToString(s) 第五章习题六 private void button1_Click(object sender, EventArgs e) int a; int i, n; n = Convert.ToInt32(textBox1.Text); BestPerson f = new BestPerson(); f.getBestPosition(n, out a); for (i = 0; i n; i+) textBox3.Text = textBox3.Text + Convert.ToString(ai); public partial class BestPerson public void getBestPosition(int a, out int s) s = new int50; int i, j = -1, k; for (i = 0; i a; i+) si = 0; for (i = 1; i 0 & a 0) if (n = 1) return (1); else return (n * fac(n - 1); else return 1; private void button1_Click(object sender, EventArgs e) int n, s; n = Convert.ToInt32(textBox1.Text); s = fac(n); textBox2.Text = Convert.ToString(s); 第六章 习题七 private void button1_Click(object sender, EventArgs e) int i; party p = new party3; party p1 = new party(); communistParty p2 = new communistParty(); kuomintang p3 = new kuomintang(); p0 = p1; p1 = p2; p2 = p3; for (i = 0; i 3; i+) pi.sayPolicy(); public class party public virtual void sayPolicy() MessageBox.Show(两岸同属于一个中国。); public class communistParty :party public override void sayPolicy() MessageBox.Show(两岸同属于一个中国，用一国两制统一中国。); public class kuomintang :party public override void sayPolicy() MessageBox.Show(两岸同属于一个中国，用三民主义统一中国。); private void button1_Click(object sender, EventArgs e) Cat c = new Cat(); = textBox1.Text; Mouse m = new Mouse(); = textBox2.Text; c.getUp +=new sayGetUpDelegate(m.sayGetUp); c.crow();习题八 public delegate void sayGetUpDelegate(); public class Cat public event sayGetUpDelegate getUp; public string name; public void crow() MessageBox.Show(name+喵喵喵喵喵喵); getUp(); public class Mouse public string name; public void sayGetUp () MessageBox.Show(name+快跑！); 习题九private void button1_Click(object sender, EventArgs e) train t = new train(); = textBox1.Text; cat c = new cat(); = textBox2.Text; c.h = Convert.ToInt16(textBox3.Text); t.nshow(); c.nshow(); private void button2_Click(object sender, EventArgs e) train t = new train(); cat c = new cat(); t.shout(); c.shout();public interface makeVoice int hget;set; void shout(); public abstract class Vehicle public string name; public abstract void nshow(); public abstract class Anima public string name; public abstract void nshow(); public class train:Vehicle ,makeVoice int H; public int h get return this.H; set this.H = value; public override void nshow()MessageBox.Show(train的名字是+name); public void shout()MessageBox.Show(train +呜呜嗒嗒。呜呜嗒嗒); public class cat:Animal ,makeVoice int H; public int h get return this.H; set this.H = value; public override void nshow() MessageBox.Show(cat的名字是 + name+身高是+h); public void shout() MessageBox.Show(cat +喵喵喵。喵喵喵);第七章 习题一随机产生10个两位整数，找出其中最大值，最小值、高于平均数的数 private void button1_Click(object sender, EventArgs e) int sum = 0; int z; Random ra = new Random(); int a = new int10; for (int i = 0; i a.Length; i+) ai = ra.Next(10, 100); for (int i = 0; i a.Length; i+) textBox1.Text += Convert.ToString(ai+ ) ; for (int i = 0; i a.Length; i+) sum += ai ; z = sum / 10; textBox4.Text = Convert.ToString(z) for (int i = 0; i = z) textBox5.Text += Convert.ToString(ai + ); Array.Sort(a); textBox2.Text = Convert.ToString(a9); textBox3.Text = Convert.ToString(a0); 产生10个学生的成绩，并用冒泡进行排序private void button1_Click(object sender, EventArgs e) Random ra = new Random(); int a = new int10; for (int i = 0; i a.Length; i+) ai = ra.Next(1, 100); textBox1.Text += Convert.ToString(ai + ); for (int i = 0; i a.Length-1; i+) for (int j = i + 1; j a.Length; j+) if (ai aj) int t; t = ai; ai = aj; aj = t; for (int i = 0; i a.Length; i+) textBox2.Text += Convert.ToString(ai + ); 交错数组 private void button1_Click(object sender, EventArgs e) int jcArray = new int4; jcArray0 = new int 1, 32, 89, 6, 8 ; jcArray1 = new int 2,17,8 ; jcArray2 = new int 3,5; jcArray3 = new int 4,9,23,12 ; textBox1.Text = 交错数组的数据: + rn; foreach (int j in jcArray) int x = 0; foreach (int i in j) x += i; textBox1.Text += Convert.ToString(i) + t; textBox1.Text += rn+该行数据总和为：+Convert.ToString(x)+rn; 用二维数组存储学生成绩private void button1_Click(object sender, EventArgs e) int, cj = 1001, 93 , 1004, 78 , 1002, 59 , 1005, 87 , 2001, 55 ; textBox1.Text = 学生成绩; for(int i=0;icj .GetLength(0);i+) for (int j = 0; j cj.GetLength(1); j+) if (j = 1) textBox1.Text = textBox1.Text + t + Convert.ToString(cji, j); else textBox1.Text = textBox1.Text + rn + Convert.ToString(cji, j); textBox1.Text = textBox1.Text + rn + 不及格的学生; for (int i = 0; i cj.GetLength(0); i+) if (cji, 1 60) textBox1.Text = textBox1.Text + rn + Convert.ToString(cji, 0)+ t+Convert .ToString(cji,1) textBox1.Text+=rn+平均成绩; int sum = 0; int z; ; for (int i=0;icj.GetLength(0);i+) sum += cji, 1; z = sum / cj.GetLength(0); textBox1.Text += Convert.ToString(z); 第十章简易文本编辑器private void button1_Click(object sender, EventArgs e) richTextBox1.Text = ; private void button2_Click(object sender, EventArgs e) openFileDialog1.FileName=; openFileDialog1.ShowReadOnly=true; openFileDialog1.ReadOnlyChecked =true; openFileDialog1.Filter = *.text|*.text|RTF文件(*.rtf)|*.rtf; if (openFileDialog1.ShowDialog() = DialogResult.OK) richTextBox1.LoadFile(openFileDialog1.FileName, RichTextBoxStreamType.RichText); private void button3_Click(object sender, EventArgs e) saveFileDialog1.InitialDirectory = f:; saveFileDialog1.Filter = *.text|*.text|RTF文件(*.rtf)*.rtf; if (saveFileDialog1.ShowDialog() = DialogResult.OK) richTextBox1.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.RichText); private void button4_Click(object sender, EventArgs e) fontDialog1.ShowApply = true; if (fontDialog1.ShowDialog() = DialogResult.OK) richTextBox1.Font = fontDialog1.Font; private void button5_Click(object sender, EventArgs e) colorDialog1.ShowHelp = true; if (colorDialog1.ShowDialog() = DialogResult.OK) richTextBox1.SelectionColor = colorDialog1.Color; private void Form1_Load(object sender, EventArgs e) 第十一章通讯录（数据库） OleDbConnection mConn = new OleDbConnection(); OleDbDataAdapter mAdapter; OleDbCommandBuilder mBuilder; DataTable mDatatable = new DataTable(); int mRowposition = 0; private void showRecord() if (mDatatable.Rows.Count = 0) textBox1.Text = ; textBox2.Text = ; textBox3.Text = ; textBox4.Text = ; textBox5.Text = ; textBox1.Text = mDatatable.RowsmRowposition编号1.ToString(); textBox2.Text = mDatatable.RowsmRowposition姓名.ToString(); textBox3.Text = mDatatable.RowsmRowposition性别.ToString(); textBox4.Text = mDatatable.RowsmRowposition籍贯.ToString(); textBox5.Text = mDatatable.RowsmRowposition电话.ToString(); public Form1() InitializeComponent(); private void label1_Click(object sender, EventArgs e) private void Form1_Load(object sender, EventArgs e) mConn.ConnectionString = Provider =Microsoft.Jet.OLEDB.4.0;Data Source =F:新建文件夹1208150129林相玲（12）通讯录.mdb; mConn.Open(); mAdapter = new OleDbDataAdapter(select *