C#程序题集合-程序填空题(38页).doc

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1、-五 程序填空题（红色位置为空，红色文字为答案）（1）字符及其ASCII码转换using System;namespace L2_1 class L2_1 static void Main() Console.Write(请输入一个字符: ); char ch = Console.ReadKey().KeyChar; Console.WriteLine(rn字符0的ASCII代码为1, ch, (int)ch); Console.Write(请输入一个整数:); int i = int.Parse(Console.ReadLine(); Console.WriteLine(ASCII码0对应的

2、字符为1, i, (char)i); (2) 字符串加密和解密using System;namespace L5_2 class L5_2 static void Main() Console.WriteLine(请输入一个字符串：); string text = Console.ReadLine(); Console.Write(请输入加密字符：); int key = Console.Read(); string text1 = ; foreach (char ch in text) text1 += (char)(ch key); Console.WriteLine(加密后的字符串为：

3、+ text1); string text2 = ; foreach (char ch in text1) text2 += (char)(ch key); Console.WriteLine(解密后的字符串为： + text2); (3) 坐标点类public class CzPoint private double x; private double y; public double X get return x; set x = value; public double Y get return y; set y = value; public CzPoint(double x, dou

4、ble y) this.x = x; this.y = y; public void Move(double dx, double dy) x += dx; y += dy; public static bool operator =(CzPoint p1, CzPoint p2) return (p1.x = p2.x) & (p1.y = p2.y); public static bool operator !=(CzPoint p1, CzPoint p2) return (p1.x != p2.x) & (p1.y != p2.y); (4) 通过方法交换两个变量的值using Sys

5、tem;namespace P3_1class FormalParametersSamplepublic static void Main()double x = 5;double y = 10;CzMath c = new CzMath(); Console.WriteLine(交换前x=0, y=1, x, y); /c.Swap(x, y); c.Swap(ref x, ref y); Console.WriteLine(交换后x=0, y=1, x, y);class CzMath public void Swap(ref double x, ref double y) double

6、temp = x; x = y; y = temp; （5）排序输出三个数并求和using System;namespace P3_6 class VariableInitiationSample static void Main() double sum; CzMath.Output(out sum, 1, 2.5, 5); class CzMath /交换两个数的值 public static void Swap(ref double x, ref double y) double temp = x; x = y; y = temp; /排序输出三个数并求和 public static v

7、oid Output(out double sum, params double array) sum = 0; if (array.Length != 3) return; sum = array0 + array1 + array2; if (array0 array1) Swap(ref array0, ref array1); if (array1 array2) Swap(ref array1, ref array2); if (array0 array1) Swap(ref array0, ref array1); Console.WriteLine(0 1 2, array0,

8、array1, array2); Console.WriteLine(sum); （6）闰年测试using System;namespace P4_11class LogicalConditionOperationpublic static void Main()int year; Console.WriteLine(请输入一个年份：); if (int.TryParse(Console.ReadLine(), out year)if (year % 400) = 0 | (year % 4) = 0 & (year % 100) != 0)Console.WriteLine(闰年);else

9、Console.WriteLine(非闰年); （7）using System;namespace P4_12 class Test public static void Main() BankCard card2 = new BankCard(); card2.m_id = 002; CreditCard cc = card2 as CreditCard; if (cc != null) cc.Borrow(50); else Console.WriteLine(0并非信用卡, card2.m_id); class BankCard public string m_id; class Cre

10、ditCard : BankCard public uint m_debit; public void Borrow(uint x) m_debit = m_debit - x; Console.WriteLine(信用卡0: 贷款1元, m_id, x); （8）using System;namespace P4_3 class Test static void Main() Weekday day = Weekday.Sunday; Console.Write(day); enum Weekday Sunday, Monday, Tuesday, Wednesday, Thursday,

11、Friday, Saturday （9）using System;namespace P5_1class Teststatic void Main()Console.WriteLine(请输入之间的一个分数:);int x = int.Parse(Console.ReadLine();switch (x)case 5:Console.WriteLine(优秀);break;case 4:Console.WriteLine(良好);break;case 3:Console.WriteLine(及格);break;default: /3分以下均不及格Console.WriteLine(不及格);b

12、reak;（10）素数测试using System;namespace P5_10 class PrimeSample static void Main() Console.WriteLine(请输入一个正整数:); ulong n; if (!ulong.TryParse(Console.ReadLine(), out n) Console.WriteLine(格式不正确); return; if (CzMath.IsPrime(n) Console.WriteLine(0是一个素数, n); else Console.WriteLine(0不是一个素数, n); public class

13、CzMath public static bool IsPrime(ulong x) for (ulong l = 2; l 1); return result; (13)测试字符a的个数using System;namespace P5_6 class ForeachCycleSample static void Main() Console.WriteLine(请输入一个字符串:); string text = Console.ReadLine(); int i = 0; foreach (char ch in text) if (ch = a) i+; Console.WriteLine

14、(a共出现0次, i); （14）下面的程序用于删除一个字符串中所有相邻的重复字符。using System;namespace P5_8 class Test static void Main() Console.WriteLine(请输入一个字符串:); string str = Console.ReadLine(); if (str = ) return; Console.Write(str0); int i = 0; while (i str.Length - 1) if (stri+ = stri) continue; Console.Write(stri); （15）创建素数类us

15、ing System;namespace P6_8 public class Test static void Main() /输出前个素数 Prime p1 = new Prime(1); for (int i1 = 0; i1 10; i1+) Console.WriteLine(p1+); /输出之间的所有素数 for (uint i2 = 100; i2 1; i-) if (IsPrime(i) return new Prime(i); return new Prime(1); public static bool operator true(Prime p) return IsPr

16、ime(p.m_value); public static bool operator false(Prime p) return !IsPrime(p.m_value); public static implicit operator uint(Prime p) return p.m_value; public static bool IsPrime(uint x) for (uint i = 2; i = x / 2; i+) if (x % i = 0) return false; return true; （16）using System;using System.Collection

17、s.Generic;using System.Text;namespace P6_9 public class ThisSample public static void Main() Contact c1 = new Contact(赵丽); c1办公电话 = 010-1234567; c1传真 = 010-1234568; c1住宅电话 = 010-5155001; c1手机 = 1301301234; c1.Output(); public class Contact private string m_name; private string m_busiPhone = ; privat

18、e string m_busiFax = ; private string m_homeFax = ; private string m_mobilePhone = ; public string Name get return this.m_name; public string thisstring phoneType get switch (phoneType) case 办公电话: return m_busiPhone; case 传真: return m_busiFax; case 住宅电话: return m_homeFax; case 手机: return m_mobilePho

19、ne; default: return null; set switch (phoneType) case 办公电话: m_busiPhone = value; break; case 传真: m_busiFax = value; break; case 住宅电话: m_homeFax = value; break; case 手机: m_mobilePhone = value; break; default: break; public Contact(string name) m_name = name; public virtualvoid Output() public class B

20、usiness : Contact public Business(string name):base(name)public override void Output() Console.WriteLine(Name); Console.WriteLine(B)0 (F)1 (H)2 (M)3 , base办公电话, base传真, base住宅电话, base手机); (17)using System;class CZ int a = 0; public static CZ operator +(CZ y) y.a = y.a + 2; return y; static void Main

21、() CZ x = new CZ(); x+; Console.WriteLine(x.a); (18)class FW private int nscore; public int score get return nscore; set nscore = value; (19) 以下程序是从一个整数数组的元素中找出最大的元素，请将该方法补充完整。using System;class array1 static void Main() int a = 26, 38, 91, 63, 58, 21, 65, 75 ; int t = 0, max = a0; for (int i = 1; i

22、 max) max = ai; t = i; Console.WriteLine(该数组中最大的数为：0, max); Console.WriteLine(最大的数的数组下标为：0, t); (20) 以下程序是从键盘上输入一个数，对该数进行四舍五入，请将该方法补充完整。using System;class Sumw static void Main() Console.Write(输入实数：); Fun(double.Parse(Console.ReadLine(); public static void Fun(double a) int b = (int)a; if (Math.Abs(a - b) = 0.5) if (a 0.0) b+; else b-; Console.WriteLine(0进行四舍五入后的值为：1 , a, b); (21) 下列程序是输出100以内所有能被7整除的数，请将程序补充完整。using System;class Output static void Main() for (int k = 1; k = 0) str+= sj-; return str; （23）第 39 页-