C鄭阿奇實用教程 實驗部分 實驗二 的代碼和截圖 以及自己練練部分答案

1、using System;public class TestNumSort public static void Main() int a, b, c, d; for (a = 1; a <= 4; a+) for (b = 1; b <= 4;b+ ) for (c=1;c <= 4;c+) if (a != b && a != c && b != c)/abc互不相等 d = 10 - a - b - c; if (c = 1 b = 2) && (c = 2 d = 3) && (a = 2 d = 4)/

2、甲乙丙都有一半是正確的 Console.Write("紅球放置在0號，黃球放置在1號，", a, b); Console.WriteLine("黑球放置在0號，白球放置在1號，", c, d); Console.Read(); using System;public class TestNumSort public static void Main() int a=1, b=1, c=1, d; while (a <= 4) while (b <= 4) while (c <= 4) if (a != b) if ( a != c) i

3、f ( b != c)/abc互不相等 d = 10 - a - b - c; if (c = 1 && b = 4) && (a = 2 && d = 3)/甲乙丙都有一半是正確的 Console.WriteLine("紅球放置在0號，黃球放置在1號,黑球放置在2號，白球放置在3號，", a,b,c, d); c+; b+; c = 1; a+; b = 1; c = 1; Console.Read(); using System;public class TestNumSort public static void Mai

4、n() double sum = 0.5, t, t1, t2, t3, p = 0.5 * 0.5; int odd = 1, even = 2; t = t1 = t2 = 1.0; t3 = 0.5; while (t > 1e-10) t1 = t1 * odd / even; odd += 2; even += 2; t2 = 1.0 / odd; t3 = t3 * p; t = t1 * t2 * t3; sum += t; Console.WriteLine("nPI=0,10:f8", sum * 6); Console.Read(); using

5、System;public class TestNumSort public static void Main() double sum = 0.5, t, t1, t2, t3, p = 0.5 * 0.5; int odd = 1, even = 2; t = t1 = t2 = 1.0; t3 = 0.5; do t1 = t1 * odd / even; odd += 2; even += 2; t2 = 1.0 / odd; t3 = t3 * p; t = t1 * t2 * t3; sum += t; while (t > 1e-10); Console.WriteLine

6、("nPI=0,10:f8", sum * 6); Console.Read(); using System;public class TestNumSort public static void Main() double sum = 0.5, t, t1, t2, t3, p = 0.5 * 0.5, s; int odd = 1, even = 2; t = t1 = t2 = 1.0; t3 = 0.5; while (t > 1e-10) t1 = t1 * odd / even; odd += 2; even += 2; t2 = 1.0 / odd; t

7、3 = t3 * p; t = t1 * t2 * t3; sum += t; Console.Write("請輸入圓的半徑："); string j = Console.ReadLine(); int r = Convert.ToInt32(j); s = sum * 6 * r * r; Console.WriteLine("nPI=0,10:f8,s=1,10:f8", sum * 6, sum * 6 * r * r); Console.Read(); using System;public class Test6174 public stati

8、c void Main() Console.Write("請輸入一個4位整數(shù)"); string s = Console.ReadLine(); int num = Convert.ToInt32(s); int each = new int4; int max, min, i, j, temp; while (num != 6174 && num != 0) i = 0; while (num != 0) eachi+ = num%10; num = num / 10; for (i = 0; i < 3; i+) for (j = 0; j <

9、; 3 - i; j+) if (eachj > eachj + 1) temp = eachj; eachj = eachj + 1; eachj + 1 = temp; min = each0 * 1000 + each1 * 100 + each2 * 10 + each3; max = each3 * 1000 + each2 * 100 + each1 * 10 + each0; num = max - min; Console.WriteLine("0-1=2", max, min, num); Console.Read(); using System;u

10、sing System.Collections.Generic;using System.Linq;using System.Text;namespace test3 class Program public static bool testInput(string s) for (int n = 0; n < s.Length; n+) if (!Char.IsNumber(sn) return false; return true; static void Main(string args) Console.Write("請輸入一個4位整數(shù)："); string

11、s = Console.ReadLine(); while (!testInput(s) Console.WriteLine("輸入錯誤不是整數(shù)！請重新輸入正確的4位整數(shù)"); s = Console.ReadLine(); int num = Convert.ToInt32(s); int each = new int4; int max, min, i, j, temp; while (num != 6174 && num != 0) i = 0; while (num != 0) eachi+ = (int)(num * 0.1 - (int)(num * 0.1) * 10); num = num / 10; for (i = 0; i < 3; i+) for (j = 0; j < 3 - i; j+) if (eachj > eachj + 1) temp = eachj; eachj = eachj + 1; eachj + 1 = temp; min = each0 * 1000 + each1 * 100 + each2 * 10 + each3; max = each3 * 1000