4.14 第六周作业

1.
package Dmh;


public class 414zy {

    public static void main(String[] args) {

        int a[]={6,34,55,1,32,4};
        for(int i=0;i<a.length-1;i++){
            for(int n=0;n<a.length-1-i;n++){
            if(a[n]>a[n+1]){
                int c=a[n];
                a[n]=a[n+1];
                a[n+1]=c;
            }
        }
            
        }
        for(int j=0;j<a.length;j++){
            System.out.println(a[j]);
        }
}
}

2.
package Dmh;

import java.util.Scanner;

public class 414zy {

    public static void main(String[] args) {

        int [] a = {34,22,35,67,45,66,12,33};
        Scanner input = new Scanner(System.in);
        System.out.println("请输入要查找的数字");
        int j = input.nextInt();
        for (int i = 0; i < a.length; i++) {
            if(j == a[i]) {
                System.out.println("下标是：" + i);
                return;
            }
        }
        System.out.println("not found");
        return;
        
        
        
        
    }

}
3.
package Dmh;


public class 414zy {

    public static void main(String[] args) {

        double [][]a={{1,2,3,4,5},{6,7,8,9,0},{1,2,3,4,5},{6,7,8,9,0}};
        for(int i=0;i<4;i++){
            for(int j=0;j<5;j++)
                System.out.print(a[i][j]+"\t");
            System.out.println();
        }
    }
}

4.
package Dmh;


public class 414zy {

    public static void main(String[] args) {

        int [][]a={{1,9,99,13},{5,22,4,19},{20,43,24,22}};
        int max=a[0][0];
        for(int i=0;i<3;i++){
            for(int j=0;j<4;j++){
                if(a[i][j]>max){
                    max=a[i][j];
                }
            }

        }
        System.out.println(max);
    }
}