4.16 on-board

1. There are 10 judges to score, (remove one highest and one lowest) to get the average score.

 1 package pro1;
 2 
 3 import java.util.*;
 4 
 5 public class test {
 6     public static void main(String[] args) {
 7         int a[] = new int[10];
 8         int sum = 0, max = 0, min = 1000;
 9         System.out.println("请输入分数");
10         for (int i = 0; i < a.length; i++) {
11             Scanner input = new Scanner(System.in);
12             a[i] = input.nextInt();
13         }
14         for (int j = 0; j < a.length; j++) {
15             if (a[j] > max) {
16                 max = a[j];
17             }
18         }
19         for (int x = 0; x < a.length; x++) {
20             if (a[x] < min) {
21                 min = a[x];
22             }
23         }
24         for (int y = 0; y < a.length; y++) {
25             sum += a[y];
26         }
27         System.out.println("平均分为" + (sum - max - min) / 8.0);
28     }
29 }

2. Learn about Java random numbers by yourself, generate a random array of length 10 (each number ranges from 0 to 99), and output after sorting.

{45,88,72,32,}

 1 package pro1;
 2 
 3 import java.util.Random;
 4 import java.util.*;
 5 
 6 public class test {
 7     public static void main(String[] args) {
 8         int a[] = new int[10];
 9         Random b = new Random();
10         for (int i = 0; i < a.length; i++) {
11             a[i] = b.nextInt(100);
12         }
13         for (int i = 0; i < a.length - 1; i++) {
14             for (int n = 0; n < a.length - 1 - i; n++) {
15                 if (a[n] > a[n + 1]) {
16                     int c = a[n];
17                     a[n] = a[n + 1];
18                     a[n + 1] = c;
19                 }
20             }
21 
22         }
23         for (int x = 0; x < a.length; x++) {
24             System.out.println(a[x]);
25         }
26     }
27 }

3. Make 7 out of 35 lottery programs. (That is, 1 ~ 35 randomly generates 7 non-repeating numbers)

 1 package pro1;
 2 
 3 import java.util.Random;
 4 import java.util.*;
 5 
 6 public class test {
 7     public static void main(String[] args) {
 8         int a[] = new int[7];
 9         Random b = new Random();
10         for (int i = 0; i < a.length; i++) {
11             a[i] = b.nextInt(35) + 1;
12         }
13         for (int x = 0; x < a.length; x++) {
14             System.out.println(a[x]);
15         }
16 
17     }
18 }

4. Define an int array of length 10 (if there is no special instruction, static assignment and dynamic assignment can be used), statistics of the maximum and minimum values in the array, and the number of odd and even numbers

 1 package pro1;
 2 
 3 import java.util.Random;
 4 import java.util.*;
 5 
 6 public class test {
 7     public static void main(String[] args) {
 8         int a[] = { 10, 20, 33, 34, 87, 90, 88, 9, 38, 44 }, q = 0;
 9         int o = 0, max = a[0], min = a[0];
10         for (int i = 0; i < a.length; i++) {
11             if (a[i] % 2 == 0) {
12                 o = o + 1;
13             } else {
14                 q = q + 1;
15             }
16         }
17         for (int x = 0; x < a.length; x++) {
18             if (a[x] > max) {
19                 max = a[x];
20             }
21         }
22         for (int y = 0; y < a.length; y++) {
23             if (a[y] < min) {
24                 min = a[y];
25             }
 26          }
 27          System.out.println ("The maximum value is" + max + ", the minimum value is" + min + ", odd number has" + q + ", even number has" + o + "number" );
 28      }
 29 }

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