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  • 第七次java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

    import java.util.*;
    
    public class aa {
    
    public static void main(String[] args) {
    // TODO Auto-generated method stub;
    int[] a = new int [5] ; 
    Scanner sc = new Scanner (System.in);
    System.out.println("请依次输入数组各元素的值");
    for (int i = 0; i < a.length; i++) {
    a[i]=sc.nextInt();
    }
    for (int i=0;i<a.length-1;i++) {
    for(int j=0;j<a.length-i-1;j++) {
    if(a[j]>a[j+1]) {
    int x=a[j];
    a[j]=a[j+1];
    a[j+1]=x;
    }
    }
    }
    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 a;
    
    import java.util.*;
    
    public class aa {
    
    public static void main(String[] args) {
    // TODO Auto-generated method stub;
    int[] a = { 34, 22, 35, 67, 45, 66, 12, 33 };
    Scanner sc = new Scanner(System.in);
    System.out.println("输入数字,我将查找它是否在数组中");
    int x = sc.nextInt();
    int y = 0;
    for (int i = 0; i < a.length; i++) {
    if (x == a[i]) {
    System.out.println("它的下标为:" + i);
    y=1;
    }
    }
    if (y == 0) {
    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 a;
    
    import java.util.*;
    
    public class aa {
    
    public static void main(String[] args) {
    // TODO Auto-generated method stub;
    double[][] a = new double [4][5];
    double x=0.1;
    Scanner sc = new Scanner(System.in);
    for(int i=0;i<a.length;i++) {
    for(int j=0;j<a[i].length;j++) {
    a[i][j]+=x;
    x++;
    }
    }
    for(int i=0;i<a.length;i++) {
    for(int j=0;j<a[i].length;j++) {
    System.out.print(a[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 a;
    
    import java.util.*;
    
    public class aa {
    
    public static void main(String[] args) {
    // TODO Auto-generated method stub;
    int[][] a = new int[3][4];
    int x = 1;
    Scanner sc = new Scanner(System.in);
    for (int i = 0; i < a.length; i++) {
    for (int j = 0; j < a[i].length; j++) {
    a[i][j] += x;
    x++;
    }
    }
    System.out.println("输入数组为:");
    int max = 0;
    for (int i = 0; i < a.length; i++) {
    for (int j = 0; j < a[i].length; j++) {
    System.out.print(a[i][j] + " ");
    if (max < a[i][j]) {
    max = a[i][j];
    }
    }
    System.out.println();
    }
    System.out.println("输出的最大值为:" + max);
    }
    }
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  • 原文地址:https://www.cnblogs.com/Zzzhqh/p/12704965.html
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