09-10第一學期-網(wǎng)絡計算答案

1、2009 年2010 年第一學期網(wǎng)絡計算期末試題B 卷一、單項選擇題（每題 2 分，共 40 分）1.A2. D3.B4.C5.B16A17D18 A 19C20C二、程序分析題 (共 20 分)1. Wednesday Apr 3 2. 7 9 136.D7.B8.D9.D10.A11.B12.A13.C14A15A3.class program3x = 1;sic consty =2;z = 3;public program3()x = 5;y = 10;sic program3()y = 10;sic void Main()program3 p = new program3() ;Con

2、sole.Wri Console.Wri Console.Wriine(p.x); ine(program3.y); ine(program3.z);void f( )x *= 2 ; y *= 2 ;三、程序填空題（共 18 分）public class BCardprotected decimal m_amount;public virtual void Dem_amount += x;it(decimal x)public virtual void Withdraw(decimal x)if (m_amount x)m_amount -= x;Console.Wriine(取款0元,余額

3、1元, x, m_amount);elseConsole.Wriine(余額);public class ForeignBCard : BCardpublic override void Withdraw(decimal x)decimal fee = x * 0.01M; if (m_amount x + fee)m_amount -= (x + fee);Console.Wriine(取款0元, 手續(xù)費1元, 余額2元, x, fee,m_amount);elseConsole.Wriine(余額);public class LimitedBCard : BCardpublic overr

4、ide void Withdraw(decimal x)if (x = 1000)Console.Wriine(對不起，此卡限制 1000 元以上取款);elsebase.Withdraw(x);四、編程題（共 22 分）class DirectorySlesic void Main(string args)string sPath;if (args.Length = 0)sPath = Directory.GetCurrentDirectory();elsesPath = args0; ShowDirectoryInfo(sPath, 0);public sic void ShowDirectoryInfo(string sPath,iLevel)for (i = 0; i iLevel; i+) Console.Write( );if(iLevel = 0)Console.WrielseConsole.Wriine(目錄0, sPath);ine(子目錄0, sPath);string files = Directory.GetFiles(sPath); foreach (string sFile in files)for (i = 0; i 0;-)if (sPath = ) break;if (= sPat