第七次上机练习
1.有10个评委打分,(去掉一个最高一个最低)求平均分。
package yukikaze; import java.util.Scanner; public class mhm { public static void main(String[] args) { avg10(); } public static void avg10() { int[] array = {89, 89, 92, 94, 78, 91, 88, 92, 90, 90}; int index = 0, sum = 0, temp = 0, avg = 0 ; for (int i = 0; i < array.length - 1; i++) { for (int j = i + 1; j < array.length; j++) { if (array[j] < array[i]) { temp = array[i]; array[i] = array[j]; array[j] = temp; } } } while (array.length != index) { sum += array[index]; index++; } do { sum = sum - array[0] - array[array.length-1]; //去掉最高分和最低分, } while (false); avg = sum / 8; System.out.println(avg); } }
2.自学一下Java随机数,生成一个长度为10的随机数组(每个数的范围是0~99),排序后输出。
package yukikaze; import java.util.Scanner; import java.util.Arrays; public class mhm { public static void main(String[] args) { // TODO Auto-generated method stub Scanner s = new Scanner(System.in); System.out.println("请输入一个范围"); System.out.println("请输入最大值"); int n = s.nextInt(); System.out.println("请输入最小值"); int m = s.nextInt(); int a[] = new int[10]; for (int t = 0; t < a.length; t++) { a[t] = m + (int) (Math.random() * n - m); } Arrays.sort(a); for (int y : a) { System.out.print(y+"\t"); } } }
3.制作彩票35选7程序。 (就是1~35随机生成7个不重复的数)
package yukikaze; import java.util.Random; public class mhm { public static void main(String[] args) { Random r = new Random(); int i=r.nextInt(35)+1; System.out.println("35选7号码为:"); for (int j = 0; j <7; j++) { int k = r.nextInt(35)+1; System.out.println(j); } } }
4.定义一个长度为10的int数组,统计数组中的最大值、最小值、以及奇数和偶数的个数
package yukikaze; import java.util.Random; public class mhm { public static void main(String[] args) { int[] score = new int[10]; Random r = new Random(); for (int i = 0; i < score.length; i++) { score[i] = r.nextInt(100); } System.out.println("原数组为:"); for (int i = 0; i < score.length; i++) { System.out.println(score[i]); } for (int i = 0; i < score.length - 1; i++) { for (int j =0; j < score.length - 1 - i; j++) { if (score[j] > score[j + 1]) { int tmp = score[j]; score[j] = score[j + 1]; score[j + 1] = tmp; } } } int ji = 0, ou = 0; for (int i = 0; i < score.length; i++) { if (score[i] % 2 == 0) { ou++; } else { ji++; } } System.out.println("最小值为:" + score[0]); System.out.println("最大值为:" + score[score.length - 1]); System.out.println("奇数个数:" + ji); System.out.println("偶数个数:" + ou); } }