第六周作业

package com.xuexiao;

import java.util.Scanner;

public class Text8 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        /*
1.定义长度位5的整型数组,输入他们的值,用冒泡排序后输出.*/
        Scanner input=new Scanner(System.in);
        System.out.println("请输入数组的值");
        int[]arr = new int[5];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = input.nextInt();
        }
        for (int i = 0; i < arr.length-1; i++) {
            for (int j = 0; j < arr.length-1-i; j++) {
                if (arr[j]>arr[j+1]) {
                    int temp = arr[j];
                    arr[j] = arr[j+1];
                    arr[j+1] = temp;
                }
            }
        }
        System.out.println("冒泡排序后输出为：");
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i] + " ");
        }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text8 {

    public static void main(String[] args) {
         //2.定义数组{34,22,35,67,45,66,12,33},输入一个数a,查找在数组中是否存在,如果存在,输出下标,不存在输出"not found"
        int[] arr = {34,22,35,67,45,66,12,33};
        int j=0;
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个数");
        int a = sc.nextInt();
        for(int i = 0;i<arr.length;i++) {
            if(a==arr[i]) {
                j=1;
                int xiabiao = i;
                System.out.println("下标为："+xiabiao);
                break;
            }
        }if(j==0) {
            System.out.println("no found");
        }
    }

}

 

 

package com.xuexiao;

import java.util.Scanner;

public class Text8 {

    public static void main(String[] args) {
        //3.以矩阵的形式输出一个double型二维数组（长度分别为5、4，值自己设定）的值。
        double[][] arr = {{11,22,33,44},{55,66,77,88},{99,10,11,12},{13,14,15,16},{17,18,19,20},{21,22,23,24}};
            for(int i =0;i< arr.length;i++) {
                System.out.println( );
            for(int j=0;j<arr[i].length;j++) {
                System.out.print(" ");
                    System.out.print(arr[i][j]);
                }
            }
    }

}

 

 

package com.xuexiao;

public class Text8 {

    public static void main(String[] args) {
        //4.定义一个二维数组(长度分别为3,4,值自己设定),求该二维数组的最大值.
        int[][] arr = {{10,21,31,14},{15,26,38,47},{18,24,83,46}};
        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(max);
    }

}