09-10第一學(xué)期-網(wǎng)絡(luò)計(jì)算答案

1、2009 年2010 年第一學(xué)期網(wǎng)絡(luò)計(jì)算期末試題A 卷一、單項(xiàng)選擇題（每題 2 分，共 40 分）1.D2. D3.D4.C5.A6.A7.D16D17B18 D 19A20D二、程序分析題 (共 20 分)1. public abstract class A8.D9.C10.C11.C12.A13.B14C15Aprivatem_x = 0;public virtualXget return m_x; set m_x = value; public abstractY get; set;public class B:Aprivatem_y = 0;public newXset base.X

2、= value 1; i-)if (IsPrime(i)return new Prime(i);return new Prime(1);/重載一元操作符 truepublic sic bool operator true(Prime p)return IsPrime(p.m_value);/重載一元操作符 falsepublic sic bool operator false(Prime p)return !IsPrime(p.m_value);/重載類(lèi)型轉(zhuǎn)換操作符(u)public sic implicit operator ureturn p.m_value;/判斷一個(gè)整數(shù)是否為素?cái)?shù)(Pr

3、ime p)public sic bool IsPrime(ux)for (ui = 2; i = x / 2; i+)if (x % i = 0)return false;return true;四、編程題（共 22 分）private void Form1_Load(objecder, EventArgs e)comboBox1.Items.Add();comboBox1.Items.Add(comboBox1.Items.Add(););private void button1_Click(objecif (textBox1.Text = )der, EventArgs e)richTe

4、xtBox1.Text = 用戶(hù)名不能為空;else if (textBox2.Text = )richTextBox1.Text = else if (!checkBox1.Checked)不能為空;richTextBox1.Text = 如不同意會(huì)員條款，您將不能;elseStringBuilder sb = new StringBuilder( sb.Append(rn 用戶(hù)名:);sb.Append(textBox1.Text);成功！);sb.Append(rn:);sb.Append(textBox2.Text); sb.Append(rn 請(qǐng)妥善保管您的richTextBox1.Text = sb.ToString();信息