• 第四次作业


    //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.
    package homework4;
    
    import java.util.Scanner;
    
    public class Code1 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		int[] a = new int[5];
            Scanner input = new Scanner(System.in);
            System.out.print("请输入5位数数组:");
            for (int i = 0; i < 5; 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 t = a[j];
                        a[j] = a[j + 1];
                        a[j + 1] = t;
                    }
                }
            }
            System.out.print("排序输出:");
            for (int i = 0; i < a.length; i++) {
                System.out.print(a[i] + " ");
            }
    	}
    
    }
    

      

    //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"
    package homework4;
    
    import java.util.Scanner;
    
    public class Code2 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		int[] a = {34,22,35,67,45,66,12,33};		
            Scanner input = new Scanner(System.in);
            System.out.print("输入一个数:");
            int i = input.nextInt();
            int b = 0;        
            for (int j = 0; j < a.length; j ++) {
            	if (i == a[j]){
            		System.out.println("存在该数,该数下标为:" + j);
            		b = 1;
            		}
            	}
                   if(b != 1){
                       System.out.println("not found");
                       }       
    	}
    
    }
    

      

    package homework4;
    
    public class Code3 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		double[][] arr = {{2000,2001,2002,2003},{2004,2005,2006,2007},{2008,2009,2010,2011},{2012,2013,2014,2015},{2016,2017,2018,2019},{2020,2021,2022,2023}};
            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]);
                    }
            }
    	}
    
    }
    

      

    //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.
    package homework4;
    
    public class Code4 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		int[][] a= {{11, 22, 33, 44},{55, 66, 77, 88},{99, 111, 222, 333}};
            int max = a[0][0];
            for(int i = 0; i < 3; i ++){
                for(int j = 0; j < 4; j ++){
                    if(max < a[i][j]){
                        max = a[i][j];
                    }
                }
            }
            System.out.println("output max=" + max);
    	}
    
    }
    

      

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  • 原文地址:https://www.cnblogs.com/wu-di-821-821/p/12703327.html
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