• 第六周作业 张垚


    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 zx;
    import java.util.Scanner;
    public class qq {
    	public static void main(String[] args){
    		Scanner sc = new Scanner(System.in);
    		int[] arr = new int[5];
    		for (int i = 0; i < arr.length; i++) {
    			System.out.print("请输入第" + (i + 1) + "个值:");
    			arr[i] = sc.nextInt();
    		}
    		for (int x = 0; x < arr.length - 1; x++) {
    			for (int y = 0; y < arr.length - x - 1; y++) {
    				if (arr[y] > arr[y + 1]) {
    					int temp = arr[y];
    					arr[y] = arr[y + 1];
    					arr[y + 1] = temp;
    				}
    			}
    		}
    		for (int n : arr) {
    			System.out.println(n + ", ");
    		}
    	}
    }
    

      

     

     

    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 zx;
    import java.util.Scanner;
    public class qq {
    	public static void main(String[] args){
    		Scanner sc = new Scanner(System.in);
    		System.out.print("请输入一个数:");
    		int a = sc.nextInt();
    		boolean choice = false;
    		int arr[] = { 34, 22, 35, 67, 45, 66, 12, 33 };
    		for (int i = 0; i < arr.length; i++) {
    			if (a == arr[i]) {
    				System.out.println("该数的的下标为:" + i);
    				choice = true;
    			}
    		}
    		if (choice == false)
    			System.out.println("NOT FOUND!");
    	}
    }
    

      

    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。

     

    package zx;
    import java.util.Scanner;
    public class qq {
    	public static void main(String[] args){
    		double[][] arr = { { 1,11, 21, 31 }, { 5, 15, 25, 35 },
    				{ 9, 19, 29, 39 }, { 13, 14, 15, 16 }, { 7, 17, 27,37  } };
    		for (int i = 0; i < arr.length; i++) {
    			for (int j = 0; j < arr[i].length; j++) {
    				System.out.print(arr[i][j] + "	");
    			}
    			System.out.println();
    		}
    	}
    }
    

      

    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 zx;
    import java.util.Scanner;
    public class qq {
    	public static void main(String[] args){
    		Scanner sc=new Scanner(System.in);
    		System.out.print("请输入二维数组行数:");
    		int xl=sc.nextInt();
    		System.out.print("请输入二维数组列数:");
    		int zl=sc.nextInt();
    		int [][] arr=new int[xl][zl];
    		System.out.println("请输入二维数组中的元素(以空格为间隔):");
    		for(int i=0;i<arr.length;i++) {
    			for(int j=0;j<arr[i].length;j++) {
    				arr[i][j]=sc.nextInt();
    			}
    			System.out.println();
    		}
    		int max=0;
    		for(int x=0;x<arr.length;x++) {
    			for(int y=0;y<arr[x].length;y++) {
    				if(max<arr[x][y]) {
    					max=arr[x][y];
    				}
    			}
    		}
    		System.out.println("该数组中最大值为:"+max);
    	}
    }
    

      

     

        

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  • 原文地址:https://www.cnblogs.com/ZXCVBNM1314/p/12686751.html
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