C#上机考试题目大全和答案.doc

用visual studio 2005做的（1）编程输出1到100中能被3整除但不能被5整除的数，并统计有多少个这样的数。（2）创建一个控制台应用程序，编写一个函数将十进制数转换成二进制数。程序可以让用户一直进行转换，直到输入0为止。程序中要对格式转换异常进行处理。（3）创建一个类，它存储一个int数据成员MyNumber,并给该数据成员创建属性，当该数据成员被存储时，将其乘以100；当其被读取时，将其除以100。（4）设计一个类，要求用事件每10秒报告机器的当前时间。（5）编写一个程序接受用户输入的字符。如果输入的字符是0-9数字中的一个，则显示“您输入了一个数字”，否则显示“这不是一个数字”。（6）编写一个程序，该程序使用一个数组存储30个学生的考试成绩，并给各个数组元素指定一个1-100的随机值，要求利用索引来对数组中的元素进行赋值和显示。然后计算平均成绩。（7）编写一个windows应用程序，能将窗体背景颜色1秒钟变换一次。（8）通过方法重载，使用同一个方法名print分别执行输出整数、双精度数与字符串的功能。1.using System;using System.Collections.Generic;using System.Text;namespace ConsoleApplication1 class Program static void Main(string args) int sum = 0; Console.WriteLine(能被3整除但不能被5整除的数 ); for (int i = 1; i = 0; j-) Console.Write(sj); Console.WriteLine(); else return; catch (Exception ) Console.Write(格式转换错误); 3.using System;using System.Collections.Generic;using System.Text;namespace ConsoleApplication3 class MyClass int MyNumber; public int mynumber get return MyNumber / 100; set MyNumber = value * 100; static void Main(string args) Console.Write(请输入任意一个数：); int a = Convert.ToInt32(Console.ReadLine(); MyClass m = new MyClass(); Console.Write(结果为：); m.mynumber = a; Console.WriteLine(0, m.mynumber); 4.using System;using System.Collections.Generic;using System.Text;using System.Threading;namespace ConsoleApplication4 class ClassA public void TimerHandlerA(object obj, EventArgs e) / Event handler Console.WriteLine(DateTime.Now.ToLongTimeString(); class Program static void Main() ClassA ca = new ClassA(); / Create the class object. MyTimerClass mc = new MyTimerClass(); / Create the timer object. mc.Elapsed += ca.TimerHandlerA; / Add handler A - instance. Thread.Sleep(100000); public class MyTimerClass public event EventHandler Elapsed; private void OnOneSecond(object obj, EventArgs e) if (Elapsed != null) Elapsed(obj, e); private System.Timers.Timer MyPrivateTimer; / Private timer public MyTimerClass() / Constructor MyPrivateTimer = new System.Timers.Timer(); / Create the private timer. MyPrivateTimer.Elapsed += OnOneSecond; / Attach our event handler. MyPrivateTimer.Interval = 10000; / 1 second interval. / Property Enabled is of type bool, and turns the timer on and off. MyPrivateTimer.Enabled = true; / Start the timer. 5.using System;using System.Collections.Generic;using System.Text;namespace ConsoleApplication1 class Program static void Main(string args) int a; Console.Write(请输入一个字符：); a = Convert.ToInt32(Console.ReadLine(); switch (a) case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: case 9: Console.WriteLine(您输入了一个数字); break; default: Console.WriteLine(这不是一个数字); break; 6.using System;using System.Collections.Generic;using System.Text;namespace ConsoleApplication2 class CMyclass public float a; public CMyclass() a = new float30; public float thisint index get return aindex; set aindex=value; class Program static void Main(string args) float avg=0; CMyclass m=new CMyclass(); Random n=new Random(); for(int i=0;i30;i+) mi=n.Next(100); for (int i = 0; i 30; i+) Console.Write(0, mi); Console.WriteLine(); float sum=0; for(int i=0;i 255 | j 255 |k 255) i = 100; j=50; k=200; 8.using System;using System.Collections.Generic;using System.Text;namespace ConsoleApplication4 class Myclass public int print(int x) return x; public double print(double x) return x; public string print(string x) return x; class Program static void Main(string args) Myclass m = new Myclass(); int a; Console.WriteLine(请输入一个整数：); a = Convert.ToInt32(Console.ReadLine(); Console.WriteLine(int a=0,a,m.print(a); double b; Console.WriteLine(请输入一个双精度数：); b = Convert.ToDouble(Console .ReadLine ()