第七周上机练习

 1 package as;
 2 
 3 public class unll {
 4     public static void main(String[] args) {
 5         // TODO Auto-generated method stub
 6   
 7         int a[]={80,60,20,40,90,50,80,70,90,20};
 8         double q=0;
 9         for(int i=0;i<10;i++){
10             for(int j=0;j<10;j++){
11                 int temp=0;
12                 if(a[i]>a[j]){
13                    temp=a[i];
14                    a[i]=a[j]；
15                    a[j]=temp; 
16               } 
17             }
18         }
19         
20         a[0]=0;
21         a[9]=0;
22         for(int x=0;x<10;x++){
23             q=a[x]+q;
24         }
25            q=q/8;
26     System.out.println("平均分是"+q);
27     }
28 }

 1 package as;
 2 import java.util.Random;
 3 public class unll {
 4     public static void main(String[] args) {
 5         // TODO Auto-generated method stub
 6         int[] arr = new int[10];
 7         Random ran = new Random();
 8         System.out.println("产生的随机数组为：");
 9         for (int i = 0; i < arr.length; i++) {
10             arr[i] = ran.nextInt(100);
11             System.out.print(arr[i] + " ");
12         }
13         System.out.println();
14         for (int i = 0; i < arr.length-1; i++) {
15             for (int j = 0; j < arr.length-1-i; j++) {
16                 if (arr[j]>arr[j+1]) {
17                     int temp = arr[j];
18                     arr[j] = arr[j+1];
19                     arr[j+1] = temp;
20                 }
21             }
22         }
23         System.out.println("排序后输出结果为：");
24         for (int i = 0; i < arr.length; i++) {
25             System.out.print(arr[i] + " ");
26         }
27     }
28 }

 1 package as;
 2 import java.util.Random;
 3 public class unll {
 4     public static void main(String[] args) {
 5         // TODO Auto-generated method stub
 6         int[] a = new int[7];
 7         Random b = new Random();
 8         for (int i = 0; i < 7; i++) {
 9             a[i] = b.nextInt(35) + 1;
10             for (int j = 0; j < i; j++) {
11                 if (a[j] == a[i]) {
12                     i--;
13                 }
14             }    
15         }
16         for (int i = 0; i < a.length; i++) {
17             System.out.println("35选7的号码为：" + a[i]);
18         }
19     }
20 }

 1 package as;
 2 
 3 public class unll {
 4     public static void main(String[] args) {
 5         // TODO Auto-generated method stub
 6         int a[] = {10,25,1,4,5,6,32,8,9,7};
 7         int max = a[0];
 8         int min = a[0];
 9         int countQ = 0;
10         int countO = 0;
11         for (int i = 0; i < a.length; i++) {
12             if (a[i]>max) {
13                 max = a[i];
14             }
15             if (a[i]<min) {
16                 min = a[i];
17             }
18             if (a[i]%2==0) {
19                 countQ += 1;
20             }else {
21                 countO += 1;
22             }
23         }
24         System.out.println("数组的最大值为：" + max);
25         System.out.println("数组的最小值为：" + min);
26         System.out.println("数组的偶数个数为：" + countO);
27         System.out.println("数组的奇数个数为：" + countQ);
28     }
29 }