Question

我有一个任务，我必须在一个数组中插入随机数，如果我把0作为我的数字或者如果已经达到数组长度那么循环应该停止，但是我被卡住了。

public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        int [] a1 = new int[100];


        int i = 1;
        boolean run = true;


        while(run){

            if(i < a1.length && i != 0){
                System.out.println("Insert number: (0-end)");
                a1[i] = scan.nextInt();

            }else if(i == 0){
                run = false;
            }

        }//while

Answer 1

更改此行：

 while(true){

要：

 while(run){

Answer 2

while循环应该像

 while(true){
    System.out.println("Ange tal: (0-avsluta)");
    int temp = scan.nextInt();
    if(i == a1.length || temp == 0)
    {
        break;       
    }
    else
    {
        a1[i] = temp;
        i++;
    }

}

Answer 3

如果分支则删除else并添加：

if(i==0){
   run = false;
}

in if branch。

Answer 4

试试这个（这里的循环比同时更易读）：

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int[] a1 = new int[100];
    for(int i=1; i< 100; i++) {
        System.out.println("Insert number: (0-end)");
        int nextInt = scan.nextInt();
        if(nextInt == 0) break;

        a1[i] = nextInt;
    }
    scan.close();
}

Answer 5

这将按预期工作：

public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    System.out.println("Insert size of array: ");
    int n = scan.nextInt();
    int index = 0;
    int value = -1;
    int[] a1 = new int[n]; //read the number of elements, because after you stop reading will be 0. If you leave it as int int[100] you might have all of them 0

    while (true) {
        System.out.println("Input number: ");
        value = scan.nextInt();
        if (index != n && value != 0) {
            a1[index] = value;
            index++;
        } else
            break;
    }

    System.out.println("Content of array a1 of size:"+n +" elements:");
    for(int i=0;i<a1.length;i++){
        System.out.println("a1["+i+"] = "+a1[i]);
    }
}

Answer 6

这个while循环不会因为你没有增加变量i的值而停止。所以它将是无限循环......我将i作为数组a1的索引变量...而用户输入的数字应该是根据你的问题进行检查......我已经编辑了代码，请立即查看...

 Scanner scan = new Scanner(System.in);
        int d=0;
        int [] a1 = new int[100];
             int i = 1;
            boolean run = true;
         while(run){
             if(i < a1.length && i != 0){
                    System.out.println("Ange tal: (0-avsluta)");
                    d = scan.nextInt();
                    if(d==0)
                       run=false;
                      a1[i]=d;
                     i++ 

            }//while

                }

Answer 7

使用： -

public static void main(String[] args) {

    Scanner scan = new Scanner(System.in);

    int [] a1 = new int[100];


    int i = 0;



    while(true){

        if(i < a1.length){
            System.out.println("Insert number: (0-end)");
            a1[i] = scan.nextInt();
            if(a1[i]==0)
             break;
            else
             i++;
           }
          else
          break;
         }//while ends here
     }//End of main

如果您正在寻找最简单的方法，我建议您尝试这样做： -

for(int i=0;i<100;i++){
 System.out.println("Enter the number,0 to exit");
 a1[i]=scan.nextInt();
 if(a[i]==0)
  break;
 }

Answer 8

好了，我有

扫描仪扫描=新扫描仪（System.in）;

    int [] a1 = new int[100];

    int i = 0;
    int tal;
    int mellan;
    int antal;
    boolean run = true;

    while(run){
            System.out.println("Ange tal: (0-avsluta)");
            tal = scan.nextInt();

        if( i == a1.length || tal == 0){
                break;

        }else{

            a1[i] = tal;
            i++;
        }

    }//while

如何显示放入数组的所有数字？

Answer 9

尝试此代码

 public static void main(String[] args) {

            Scanner scan = new Scanner(System.in);

            int [] a1 = new int[10];


            int i = 0;
            boolean run = true;
            int inputnum;

            while(run){
                 System.out.println("Ange tal: (0-avsluta)");
                inputnum =scan.nextInt();

                if(i<a1.length)
                {
                     if(inputnum==0)
                     {
                         run=false;
                         break;
                     }
                     else{

                         a1[i]=inputnum;
                         i++;
                     }

                }
                else
                {

                    System.out.println("Array is full");
                     run=false;
                     break;
                }



            }


            System.out.println("You are out of program");
        }

使用while循环将数据插入Java数组时，它并没有停止

9 个答案: