数组(随机生成,三种排序,二分查找)
【摘要】
namespace keshanglianxi6.28_2{ class Program { static void Main(string[] args) { Random ra= new Random(); int[] arr= new int[10]; for (int i= 0; i < 10; i++) { arr[i] = ra.Next(100,999...
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namespace keshanglianxi6.28_2
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{
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class Program
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{
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static void Main(string[] args)
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{
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Random ra= new Random();
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int[] arr= new int[10];
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for (int i= 0; i < 10; i++)
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{
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arr[i] = ra.Next(100,999);
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}
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for (int i= 0; i < arr.Length; i++)
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{
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Console.Write(arr[i] + "");
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}
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Console.WriteLine();
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sort1(arr);
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for (int i= 0; i < arr.Length; i++)
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{
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Console.Write(arr[i] + "");
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}
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//int[]arr = { 1, 22, 45, 65, 75, 84, 95, 100, 124 };
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Console.WriteLine();
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int a =f(arr,222);
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if (a ==-1)
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{
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Console.Write("没有您要查找的数:");
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}
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else
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{
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Console.Write("您要查找的数是在第"+(a+1)+"位");
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}
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Console.ReadLine();
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}
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//查找,,,
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static int f(int[] a, int n)
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{
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int low,mid, high;
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low =0;
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high =a.Length - 1;
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while (low<= high)
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{
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mid = (low + high) / 2;
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int midVal = a[mid];
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if (midVal < n)
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{
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low = mid + 1;
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}
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else if (midVal > n)
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{
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high = mid - 1;
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}
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else
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{
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return mid;
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}
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}
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return-1;
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}
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//排序,,,
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static void sort(int []a)
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{
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int i,j,temp;
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for (i =0; i < a.Length; i++) {
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for (j = 0; j < a.Length -i-1; j++) {
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if (a[j] > a[j + 1])
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{
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temp =a[j];
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a[j] = a[j+ 1];
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a[j + 1] =temp;
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}
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}
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}
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}
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static void sort1(int []a)
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{
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int i, j,temp;
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for (i =1; i < a.Length; i++) {
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j = i - 1;
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temp = a[i];
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while (j >= 0 &&temp < a[j])
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{
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a[j + 1] = a[j];
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j--;
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}
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a[j + 1] = temp;
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}
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}
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static void sort2(int[]arr)
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{
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for (int x= 0; x < arr.Length - 1; x++)
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{
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for (int y = x + 1; y <arr.Length; y++)
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{
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if (arr[x] > arr[y])
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{
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int temp =arr[x];
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arr[x] =arr[y];
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arr[y] =temp;
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}
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}
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}
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}
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}
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}
文章来源: czhenya.blog.csdn.net,作者:陈言必行,版权归原作者所有,如需转载,请联系作者。
原文链接:czhenya.blog.csdn.net/article/details/76091898
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