c#实训基础题部分.

1、使用控制台方式实现如下应用程序：基础题部分：1写一个程序，完成以下功能：从键盘上输入5个整数，求出最大最小值。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplicationlclass Programstatic void Main( string args)Console .Write( please enter 5 figure: );double a = new double 5;for ( int i = 0; i 5; i+)a

2、i =int .Parse( Console .ReadLine();double min = a0;double max = a0;for ( int j=O;j 4;j+)if (max aj + 1)max = aj+1;Console .WriteLine( max = +max);for ( int p = 0;p ap + 1)min = ap+1;Console .WriteLine( min = +min);2、写一个程序，打印出九九乘法表。using System;using System.Collections.Generic;using System.Linq;using

3、 System.Text;namespace ConsoleApplication1class Programstaticvoid Main( string args)for(int i = 1; i 10; i+)for ( int j = 1;ji+1;j+)Console .Write( +i + X + j += + (i * j);Console .WriteLine();3、分别使用for循环和while循环设计一个程序，计算从 1加到100的和。For循环：using System;using System.Collections.Generic;using System.Lin

4、q;using System.Text;namespace ConsoleApplication1class Programint sum = 0;static void Main( string args)for ( int i = 1; i = 100; i+)sum = sum + i;Console .WriteLine( sum = + sum);While循环：using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1

5、class Programstatic void Main( string int sum = 0;int i = 1;while (i = 100)args)sum i+;=sum + i;Console .WriteLine(sum = + sum);4、利用数学类提供的平方根方法计算并输出1.0, 2.0, 3.0,，10.0的平方根。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1class Programdoub

6、le x = 0.0;for ( double i = 1.0; i = 10.0; i=i+1)x =Math.Sqrt(i);Console .WriteLine(i +A2= + x);5、 随机数方法产生5个110 (包括1和10)之间的整数。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1class Programstatic void Main( string args)for ( int i = 0; i 5

7、; i+)Randomran = new Randon(i);int Randomkey = ran.Next(1, 10);Console .WriteLine(Randomkey);6、 编程实现：随机产生120之间的整数，总共生成 1000次，统计其中生成的整数0, 1,2, 3，20的个数分别是多少，并输出统计结果(每5个数一行)。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1class Programstati

8、c void Main( string args)int A;A =new int 21;for ( int i = 0; i 1000; i+)Randomran = new Random);int Randomkey = ran.Next(0, 20);int x = Randomkey;Ax+;for ( int j = 0; j 20; j+)Console .Write(Aj+);if (j + 1) % 5 = 0)Console .WriteLine();7、统计字符串“ a12bcd?A*B34 ”中分别有多少个数字和字母。using System;using System.C

9、ollections.Generic;using System.Linq;using System.Text;namespace ConsoleApplicationlclass Programstatic void Main( string args)int num = 0;int alpha = 0;String s =a12bcd?A*B34;for ( int i = 0; i s.Length; i+)String ch = s.Substring(i, 1);if ( charsNumber(ch,0)num+;charsLower(ch,0)else if ( charsUppe

10、r(ch,O) |alpha+;Console .WriteLine( num = +num+ ,alpha = +alpha);&编写程序，要求用户输入月份号码，然后显示该月的英文名称。例如，如果用户输入2,程序应显示February。要求月的英文名称存于数组中。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1class Programstatic void Main( string args)string month

11、= new string12;/ month =(January,February,March,April,May,June,July,August,September,October,No vember,December);Console .Write(请输入您要的月数：”)；string a = Convert .ToString( Console .ReadLine();switch (a)case 1Console .WriteLine( January); break;case 2:Console .WriteLine( February); break;case 3:Console

12、 .WriteLine( March); break;case 4:Console .WriteLine( April);break;case 5:Console .WriteLine( May); break;case 6:Console .WriteLine( June); break;case 7:Console .WriteLine( July); break;case 8:Console .WriteLine( August); break;case 9:Console .WriteLine( September);break;case 10:Console .WriteLine(

13、October);break;case 11:Console .WriteLine( November);break;case 12:Console .WriteLine( December); break;default :Console .WriteLine(请重新输入); break;前N项的9、请输入一个代表项数的正整数N (N W 100 ),然后输出1-3+5-7+9-11 +和。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApp

14、lication2 class Programstatic void Main( string args)int n = 0;double sum = 0;Console .Write(请输入一个代表项数的正整数N( N 100 );int a = Convert .ToInt32( Console .ReadLine();for ( int i = 1; i = 90)Console .WriteLine(等级为：A);elseif (90 great & great = 80)Console .WriteLine(等级为：B);elseif (80 great & great = 70)C

15、onsole .WriteLine(等级为：C);elseif (70 great & great = 60)elseConsole .WriteLine(等级为：D);Console .WriteLine(等级为：F不及格);Swich程序using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)Console .Write(请输入成绩：”)；i

16、nt great = Convert .ToInt32( Console .ReadLine(); int x = great / 10;switch (x)case 10:case 9:Console .WriteLine( break;等级为：A);case 8:Console .WriteLine(等级为：B);break;case 7:Console .WriteLine(等级为：C);break;case 6:Console .WriteLine(等级为：D);break;default :Console .WriteLine(等级为：F不及格break;11、读入两个正整数 m和n

17、,输出m和n的最小公倍数。 using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)Console .WriteLine(计算两个数的最小公倍数 ); Console .Write(请输入第一个数：);int num1 = int .Parse( Console .ReadLine(); Console .Write(请输入第二个数:);int

18、num2 = int .Parse( Console .ReadLine();int gys = gongyue(num1, num2);int gbs = (num1 * num2) / gys; Console .WriteLine(最小公倍数为：+ gbs);static int gongyue( int numl, int num2)int temp = numl % num2;if (temp = 0)return num2;elsereturn gongyue(num2,temp);12、判断一个整数n是否为素数。若是则输出： n是素数；否则输出 n不是素数（注: 具体的值）。us

19、ing System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)Console .WriteLine(素数的判断。”)；Console .Write(请输入一个正整数：”)； int num = int .Parse( Console .ReadLine(); int x = 0;for ( int i = 2; i Math.Sqrt(num); i+)i

20、f (num % i = 0)Console .WriteLine(不是素数”);x = i;break;if (x = 0)Console .WriteLine(是素数”)；13、用 for 循环计算 s=1!+2!+3!+ +n!。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)int x = 1;int sum = 0;Consol

21、e .Write(请输入 n = ”)；int n = int .Parse( Console .ReadLine();for ( int i = 1; i = n; i+)x = x * i;sum = sum + x;Console .WriteLine( sum = + sum);14、编程实现计算 11+22+33+44+55+ +2020using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programs

22、tatic void Main( string args)double sum = 0;for ( int i = 1; i = 20; i+)sum =Math.Pow(i, i) + sum;Console .WriteLine( sum = + sum);15、编写一个程序，打印出以下图形：*kkk*using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2 class Programstatic void Main( str

23、ing args)for ( int i = 1; i = 3; i +)for ( int j = 1; j = (i * 2) - 1); j = j + 2)Console .Write( *);Console .WriteLine();for ( int i = 1; i = (i * 2) - 1); j = j - 2)Console .Write( *);Console .WriteLine();n (*10 ),实现下列规则图形的输出。16、读入一个代表行数的正整数如果：n=4出. *using System;using System.Collections.Generic;u

24、sing System.Linq;using System.Text;namespace ConsoleApplication2 class Programstatic void Main( string args)n( n= 1; i-)for ( int m = i; m a; m+)Console .Write();for ( int j = 1; j = i * 2 - 1; j+)Console .Write( *);Console .WriteLine();17、请打印由*组成的菱形如下的图形。*1点：*using System;using System.Collections.G

25、eneric;using System.Linq;using System.Text;namespace ConsoleApplication2 class ProgramConsole .Write(输入一个代表行数的正整数n (n10):);int a = int .Parse( Console .ReadLine();for ( int i = 1; i = a; i+)for ( int m = i; m a; m+)Console .Write();for ( int j = 1; j = 1; i-)for ( int m = i; m a; m+)Console .Write()

26、;for ( int j = 1; j = i* 2 - 1; j+)Console .Write(* );Console .WriteLine();100元钱18、百元买百鸡问题。假定小鸡每只5角，公鸡每只2元，母鸡每只3元。现在有要求买100只鸡，编程列出所有可能的购鸡方案。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2 class Programstatic void Main( string args)for (

27、 int num3 = 0; num3 33; num3+)for ( int num2 = 0; num2 50; num2+)for ( int num1 = 0; num1 200; num1+)if (num1 + num2 + num3 = 100 & (5 * numl) + (20 * num2) + (30 * num3)=1000)Console .WriteLine(小鸡有+ numl + 只，公鸡有+ num2 + 只，母 鸡有+ num3 + 只);19、有一条长阶梯，若每步跨 2阶，则最后剩1阶；若每步跨3阶，则最后剩2阶；若每 步跨5阶，则最后剩4阶；若每步跨6阶，

28、则最后剩5阶。只有每次跨7阶，最后才正好 一阶不剩。编写程序算出这条阶梯至少有多少阶？using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2 class Programfor ( int x = 1; x 2fib(1) = fib(2) = 1using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace C

29、onsoleApplication2class Programstatic void Main( string args)Console .Write(请输入 n = ”)；int n = int .Parse( Console .ReadLine();int sum = fib(n);Console .WriteLine( fib (+ n +) = + sum);static int fib( int n)if (n = 1 | n = 2)return 1;elsereturn fib(n - 1) + fib(n - 2);21、读入一个正整数 n,判断其是否是回文数，若是则输出：n是

30、回文数；否则输出：n不是回文数。提示：回文数是指这样的自然数，其各位数字顺序读和倒读都一样，例如2，22，121，12321。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)int s = 0;Console .Write(请输入 n = ”)；int n = int .Parse( Console .ReadLine();int y =

31、 n;string x = Convert .ToString(n);int m = x.Length;for ( int t = m-1; t = 0; t-)int w = 0;w = y % 10;y = y / 10;s =(int ) (w * Math.Pow(10, t)+s);Console .Write(s);if (s = n)Console .WriteLine(是回文数”)；elseConsole .WriteLine(不是回文数”)；22、编程输出下面的杨辉三角。11121133114&411510105120IS17213535usingSystem;using S

32、ystem.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2 class Programstatic void Main( string args)int length = 0;Console .Write(输入杨辉三角长度：”)；length =Convert .ToInt32( Console .ReadLine();的一维数组int a = new int length; / 二维数组 a for ( int i = 0; i a.Length; i+)ai =new

33、 int i + 1;/ 遍历，赋值增量for ( int j = 0; j a.Length; j+)aj0 = 1;ajj = 1;for ( int m = 1; m aj.Length - 1; m+) ajm = aj - 1m - 1 + aj - 1m;for ( int i = 0; i a.Length; i+)for ( int j = 0; j ai.Length; j+)Console .Write( 0t, aij);Console .Write( n);Console .Read();23、有一组数据序列45, 23, 1, 2, 67, 3, 8, 56,现要求运

34、用选择排序法和冒泡排序法分别实现按从小到大顺序将它们输出。选择排序法using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication2class Programstatic void Main( string args)int A;A =new int 8 45,23,1,2,67,3,8,56;for ( int i =0;i8;i+)int k = i;for ( int j = i+1;j 8;j+)if ( Aj Ak)k = j;

35、if (k != i)int temp = 0;temp = Ai;Ai = Ak;Ak = temp;for ( int m=0;m dj)temp = di;di = dj;dj = temp;for ( int m = 0;m 8;m+)Console .WriteLine(dm +);24、若一本书厚250页，每页20行，每行40个字符。假设全书的内容已经存入了三维数组 变量book中，其下标为page line和column。要求编写程序在屏幕上输出任意指定的连续 几页上的内容（即从某起始页 startp显示至某结束页 en dp）。using System;using System

36、.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication3class Programint , , book = new int 250, 20, 40;Console .Write(输入开始页码：startp=);int startp = int .Parse( Console .ReadLine();Console .Write(请输入结束页码：endp=);int endp = int .Parse( Console .ReadLine();for ( int page =

37、0; page 250; page+)for ( int line = 0; line 20; line+)for ( int column = 0; column 40; column+)bookpage, line, column = column;for ( int page = startp-1; page = endp; page+)for ( int line = 0; line 20; line+)for ( int column = 0; column 40; column+)Console .Write(bookpage, line, column);25、给定一串正实数数列

38、，求出所有递增和递减子序列的数目，如数列7.34、2.2、6.8、9.09、8.81、3、5.2、2.3、1.8，则可以分为(7.34、2.2)，( 2.2、6.8、9.09)，(9.09、8.81、3)，( 3、5.2)，( 5.2、2.3、1.8)五个子序列，答案就是5。现在要求随机产生10个正实数的数列，然后进行处理，最后输出答案，请编程实现。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication3class Program

39、static void Main( string args)int x = 0,0,0,0,0,0,0,0;double s = 7.34,2.2,6.8,9.09,8.81,3,5.2,2.3,1.8;for ( int i = 0; i si + 1)xi = 1;else if (si si+1)xi = 2;for ( int i = 0; i x.Length; i+)Console .Write(xi +);Console .WriteLine();for ( int i = 0; i x.Length - 1; i+)if (xi != xi + 1)Console .Write

40、(si + si + 1);Console .WriteLine();else if (xi = xi + 1)Console .Write(si + si + 1 + si + 2);Console .WriteLine();i = i + 1;若是则输出:26、编写程序实现功能：输入两个字符串s1和s2 ,判断s2是否是s1的子串,1，n （n是s2在s1字符串中的起始位置）；若不是则输出：0。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Console

41、Application3class Programstatic void Main( string args)Console .Write(请输入字符串 si =);string si = Console .ReadLine();Console .Write(请输入字符串 s2 =);string s2 = Console .ReadLine();int i = 0;if (s2.Contains(s1) & sl.Length = s2.Length) i = s1.IndexOf(s2);Console .WriteLine( 1 + + (i + 1);elseConsole .Writ

42、eLine( 0);27、编写程序实现功能：已知一个英语单词串”am a student ”统计其中的单词个数（单词间用空格分隔），并输出单词个数与每个单词（一行一个单词）。using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication3 class Programstatic void Main( string args)Console .Write(请输入一个字符串 s =);string s = Console .ReadLine(

43、);string s2 = s.Split( );for ( int i = 0; i s2.Length; i+)Console .WriteLine(s2i);Console .WriteLine(共有单词+(s2.Length)+ 个);28、计算机在教育中的作用越来越大。编写一程序帮助小学生学习乘法。利用随机数方法产生两个正的一位整数，并显示出题目，如：6乘3的积是多少？学生在文本框中输入结果。程序检查该学生的答案，如果答案正确，打印出“非常棒” 并再出一道题。如果答案错误，打印字符串“不对，请再试一次。”再让学生重做该题，直到做对为止。利用一个方法来产生题目。using System

44、;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication3class Programstatic void Main( string args)Randomran = new Randon(i)；int x = ran.Next(0, 10);int y = ran.Next(0, 10);Console .Write(x +x + y +=);int z = int .Parse( Console .ReadLine();while (z != (x * y)Console .WriteLine(不对，请再试一次”)；Console .Write(x +x + y +=);z =int .Parse( Console .ReadLine();if (z = (x * y)Console .WriteLine(非常棒);29、复杂的计算机辅助教学系统可以监测学生在一段时间内的表现。修改习题28中的程序累计回答问题的正确和错误次数。在学生回答10个问题后，程序计算出回答问题的正确率，若低于75%，程序应打印出“请你的老师给你辅导一下”。using System;using System.Collections.Generic;using Sys