4.9 java作业

1.
package Dmh4.9;

public class zy {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int[] arr={10,20,30,40,50};
        for(int i=0;i<5;i++){
             System.out.println(arr[i]);       
            }            
        }
    }

2.
package Dmh4.9;
public class zy {
    public static void main(String[] args) {
         int arr [] =new int[5];
         arr [0] = 10;
         arr [1] = 20;
         arr [2] = 30;
         arr [3] = 40;
         arr [4] = 50;
            for(int i = 0;i<arr.length;i++){
                System.out.print(arr[i]);
                System.out.print(" ");
            }
        }

    }

3.

5

6

7

8

9

10

11

12

13

14

15 


package Dmh4.9;

public class zy {

public static void main(String[] args) {

        // TODO Auto-generated method stub

        int[] arr= new int[]{23,45,22,33,56};

        int p,num;

        num=arr[0]+arr[1]+arr[2]+arr[3]+arr[4];

        p=num/5;

        System.out.println(num);

        System.out.println(p);

    }

 } 

4.

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21 


package Dmh4.9;
public class zy {
public static void main(String[] args) {

        // TODO Auto-generated method stub

        int[] arr= new int[]{18,25,7,36,13,2,89,63};

        int max;

        int a=0;

        max=arr[0];

        for(int i=0;i<arr.length;i++){

        if(arr[i]>max){

            max=arr[i]; 
            a=i;

        }   

        }
 System.out.println("数组中最大值为"+max);

  System.out.println("下标为"+a);

    }
} 

5.
package Dmh4.9;
public class zy {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int [] a = {23,56,7,94,15,2,35,73};
         for (int i = 0; i < a.length / 2; i++) {  
              int t = a[i];
              a[i] = a[a.length - 1 - i];
              a[a.length - 1 - i] =t;
           }  
              for (int i = 0; i < a.length; i++) {  
                System.out.print(a[i] + " ");  
           } 
        }
}
6.
package Dmh4.9;
public class zy {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int[] m = {14,23,56,81};
        int[] n = new int[5];
        int a = 32;
        for(int i =0; i< m.length; i++){
            if(m[i] > a){
                n[i] = a;
                for(i = i + 1; i < n.length; i++ ){
                    n[i] = m[i-1];    
                }
            }
            else{
                n[i] = m[i];
            }
        }
         
        for(int i = 0; i<5; i++){
            System.out.println(n[i]);
        }
    }
}