第六周作业

package bwk2;
import java.util.Scanner;
public class Zye {
      public static void main(String[] args) {
            //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.
          int[] a = new int[5];
          int i, j;
          int temp;
          Scanner input = new Scanner(System.in);
          System.out.println("请输入5个整数:");
          for (i = 0; i < 5; i++) {
              a[i] = input.nextInt();
          }
          for (i = 0; i < a.length - 1; i++) {
              for (j = 0; j < a.length - 1 - i; j++) {
                  if (a[j] > a[j + 1]) {
                      temp = a[j];
                      a[j] = a[j + 1];
                      a[j + 1] = temp;
                  }
              }
          }
          System.out.println("排序后:");
          for (i = 0; i < a.length; i++) {
              System.out.println(a[i] + "\t");
          }
    
  }
  }

 

package bwk2;
import java.util.Scanner;
public class Zye {
      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";
          Scanner input=new Scanner(System.in);
          int b=0;
        int[] sz={34,22,35,67,45,66,12,33};
           System.out.println("输入一个数：");
           int a=input.nextInt();
            for (int i=0; i<sz.length;i++) {
                  if (a==sz[i]){
                      System.out.println("该数组下标是："+i);
                  b=1;
                   }
               }
               if(b!=1){
                   System.out.println("not found");
  }       
           
       
}}

package bwk2;
import java.util.Scanner;
public class Zye {
      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。
          Scanner input = new Scanner(System.in);
            int[][] a = new int[5][4];
            int m = 0;
            for (int i = 0; i < 5; i++) {
                for (int j = 0; j < 4; j++) {
                    a[i][j] = m;
                    m++;
                }
            }
            System.out.println("你输入的数组为:");
            for (int i = 0; i < 5; i++) {
                for (int j = 0; j < 4; j++) {
                    System.out.print(a[i][j] + "\t");
                }
                System.out.println();
            }
          
        }
        }

package bwk2;
import java.util.Scanner;
public class Zye {
      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.
          Scanner input = new Scanner(System.in);
            int[][] a = new int[5][4];
            int m = 0;
            int max=0;
            for (int i = 0; i < 3; i++) {
                for (int j = 0; j < 4; j++) {
                    a[i][j] = m;
                    m++;
                }
            }
            for (int i = 0; i < a.length; i++) {
                for (int j = 0; j < a[i].length-1; j++) {
                    if(max<a[i][j]){
                        max=a[i][j];                    
                    }
                }
            }
            System.out.println("最大值是:"+max);
          
        }
        }