using System;using System.Collections.Generic;using System.Linq;using System.Text;
namespace _1122{ class Program { //随机生成一个数列。 static int[] randomArray(int x, int y) { Random rand = new Random(); int[] array = new int[x]; for (int i = 1; i <= array.Length; i++) { array[i - 1] = rand.Next(y); } return array; }
//根据用户输入的数字生成数列。 static int[] exchangeToArray(string str) { string[] strArr = str.Split(' '); int[] array = new int[strArr.Length]; for (int i = 1; i <= strArr.Length; i++) { array[i-1]=Convert.ToInt32(strArr[i-1]); } return array; }
//得出用户输入的数列的长度 static int arrayLengthFromCustomer(string str) { int[] array = exchangeToArray(str); int length = array.Length; return length; }
//冒泡排序 static int[] Bubbles(int[] array) { for (int i = 1; i <= array.Length - 1; i++) { for (int j = 1; j <= array.Length - i; j++) { if (array[j] < array[j - 1]) { int temp = array[j - 1]; array[j - 1] = array[j]; array[j] = temp; } } } return array; }
//输出数列 static int[] outPut(int[] array) { for (int i = 0; i < array.Length; i++) { Console.Write("{0}\t", array[i]); } return array; }
//二分法查找数字 static int Search(int[] array, int goal) { Bubbles(array); int max = array.Length - 1; int min = 0; int mid; while (true) { mid = (max + min) / 2; if (min > max) { Console.WriteLine("木找到！"); break; } if (array[mid] > goal) { max = mid - 1; } if (array[mid] < goal) { min = mid + 1; } if (array[mid] == goal) { Console.WriteLine("Rock On!在第{0}个下标上！", mid); break; } } return mid; } //随机提取N个数字 static int[] Lucky(int[] array, int num) { int[] cho = new int[num]; Random rand = new Random(); int limit = array.Length;
for (int i = 1; i <= cho.Length; i++) { int id = rand.Next(array.Length - 1); cho[i - 1] = array[id];
int temp = array[id]; array[id] = array[limit-1]; array[limit-1] = temp;
limit--; } return cho; }
//求和 static int Sum(int[] array) { int sum = 0; for (int i = 1; i <= array.Length; i++) { sum += array[i - 1]; } return sum; }
//求平均数 static double Avg(int[] array) { double avg = Sum(array) * 1.0 / array.Length; return avg; }
//找出最大值 static int maxValue(int[] array) { Bubbles(array); int max = array[array.Length - 1]; return max; }
//找质数…… static List<int> primeNumber(int[] array) { //List<int> list = new List<int>(); //list.Add(2);
//for (int a = 0; a < list.Count; a++) //{ // Console.WriteLine(list[a]); //} //foreach (int b in list) //{ // Console.WriteLine(b); //} List<int> list = new List<int>(); for (int i = 0; i < array.Length; i++) { int count = 0; for (int j = 1; j <= array[i]; j++) { if (array[i] % j == 0) { count++; } } if (count == 2) { list.Add(array[i]); } } return list; }
//输出list static List<int> outPutList(List<int> list) { for (int i = 1; i <= list.Count; i++) { Console.WriteLine(list[i - 1]); } return list; }
static void Main1(string[] args) { Console.WriteLine("请输入一个数列，如果不想输入，请输入R以及你想要的数列的长度和生成区间，以空格隔开，我们会随机生成一组数字。"); string cho = Console.ReadLine(); int[] array = null; if (cho.Contains("R")) { string[] ranArr = cho.Split(' '); int length = Convert.ToInt32(ranArr[1]); int maxValue = Convert.ToInt32(ranArr[2]); array = randomArray(length, maxValue); } else { array = exchangeToArray(cho); }
Console.WriteLine("下面做一些AMAZING的事情吧！请根据提示输入数字，程序会做出相应的操作："); Console.WriteLine("1：冒泡排序，2：二分法找出数字，3：随机在数列中随机提取N个数字，4：求和，5：求平均数，6：找出最大值，7：找出里面的质数……"); Console.WriteLine("键入Q退出"); string choice = Console.ReadLine();
switch (choice) { case "1": outPut(Bubbles(array)); break;
case "2": Console.WriteLine("请输入你想要查找的数字："); int target = Convert.ToInt32(Console.ReadLine()); Search(array, target); break;
case "3": Console.WriteLine("随机提取多少个数字？"); int howMany = Convert.ToInt32(Console.ReadLine()); outPut ( Lucky(array, howMany)); break;
case "4": Console.WriteLine("这一堆数字的和是{0}", Sum(array)); break;
case "5": Console.WriteLine("这一堆数字的平均数是{0}", Avg(array).ToString("#.00")); break;
case "6": Console.WriteLine("这一堆数字的最大值是{0}", maxValue(array)); break;
case "7": outPutList(primeNumber(array)); break;
case "Q": break;
} } }}
这个小程序是我昨天练习的时候做的，里面大概综合了以前的所有知识点，我把他们都做成了函数，每一条我都加了注释，希望大家能看明白。
转载于:https://www.cnblogs.com/Dawn-z/archive/2012/11/23/2783933.html
