第六周作业

1.package finish;
import java.util.Scanner;
public class csy {
    public static void main(String[] args) {
           Scanner input=new Scanner(System.in);
           System.out.println("请输入数组的值");
             int [] a = new int [5] ;
             for (int i = 0; i < a.length; i++) {
                 a[i]=input.nextInt();
             }
                 for(int i=0;i<a.length-1;i++){
                     for(int j=0;j<a.length-1-i;j++){
                         if(a[j]>a[j+1]){
                             int temp = a[j];
                             a[j] = a[j+1];
                             a[j+1] = temp;
                         }
                     }
                 }
                     System.out.println("冒泡排序后输出为");
                     for(int i=0;i<a.length;i++)
                     {
                         System.out.print(a[i]+" ");
                     }                                               
               }              
}

2.package finish;
import java.util.Scanner;
public class csy {
    public static void main(String[] args) {
        int [] a = new int [] {34,22,35,67,45,66,12,33} ;
        Scanner input=new Scanner(System.in);
        System.out.println("输入想查询的数字");
        int i=input.nextInt();
        int b=0;
        for(int j=0;j<a.length;j++){
              if(a[j]==i){
                  System.out.println("该数存在于数组中下标为"+j);
                  b=1;
              }
        }
        if(b==0)
        {
            System.out.println("not found");
        }
  }              
}

3.package finish;
import java.util.Scanner;
public class csy {
    public static void main(String[] args) {
        double[][]arr={{1,1,1,1},{2,2,2,2},{3,3,3,3},{4,4,4,4},{5,5,5,5}};
        for(int i=0;i<arr.length;i++){
            System.out.println();
                   for(int j=0;j<arr[i].length;j++){
                   System.out.print(arr[i][j]+" ");
               }
        }
      }
}

4.package finish;
import java.util.Scanner;
public class csy {
    public static void main(String[] args) {
         int arr[][]={{1,3,5},{2,4,6},
                    {5,2,1},{13,14,9}};
            int max=arr[0][0];
            for(int i=0;i<arr.length;i++){
                for(int j=0;j<arr[i].length;j++){
                    if(arr[i][j]>max){
                        max=arr[i][j];
                    }
                }
            }
            System.out.println("该二维数组的最大值为"+max);
          }
        }