2N个数排成一行(每个数有2个), 2个1之间有1个数，2个2 之间有2个数，...2个N之间有N个数... 例312132

最新推荐文章于 2022-11-09 16:45:05 发布

lijun0988

最新推荐文章于 2022-11-09 16:45:05 发布

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分类专栏： code 文章标签： string class

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本文提供了一个Java程序实例，演示如何在数组中查找空位并插入指定数值，同时验证插入后的数组是否包含特定元素。程序通过控制台输入获取用户指定的数字，并在数组中适当的位置填充该数字，实现数据的动态插入。

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public 
class Main {
       public
static void 
main(String args[]) {
               Scanner cin =
new Scanner(System.in);
               System.out.print("enter number>");
               int
n = cin.nextInt();
               int[] arr =
new int[2
* n];
               insertNum(arr,
1, n);
       }
 
 
       static
boolean insertNum(int[] arr,
int insertNum, 
int endNum) {
               boolean
flag = false;
               for
(int 
i = 0; i < arr.length - insertNum -
1; i++) {
                       if
(arr[i] == 0 
&& arr[i + insertNum + 1] ==
0) {
                               arr[i] = insertNum;
                               arr[i + insertNum +
1] = insertNum;
                               if
(insertNum == endNum) {
                                       System.out.print("found:");
                                       for
(int 
n : arr) {
                                               System.out.print(n +
" ");
                                       }
                                       System.out.println();
                                       flag=true;
                               }
else {
                                       if
(!insertNum(arr, insertNum + 1, endNum)) {
                                               flag =
false;
                                       }
else {
                                               flag =
true;
                                       }
                               }
                               arr[i] =
0;
                               arr[i + insertNum +
1] = 0;
                       }
               }
               return
flag;
       }
}