Question

这是我使用for循环

编写的简单程序

public class Test
{
    public static void main (String[] args)
    {

        int high=10;

        for( int low =0; low <=high; low++){

            for (int mid=0; mid<=high; mid++)
            {
                System.out.print(mid);

            }
            System.out.println();    
        }
    }
}

但我希望输出看起来像

0 1 2 3 4 5 6 7 8 9 10

1 2 3 4 5 6 7 8 9 10

2 3 4 5 6 7 8 9 10

etc...

10

相反，我的输出看起来像012345678910012345678910012345678910012345678910012345678910012345678910012345678910012345678910012345678910012345678910012345678910

我做错了什么？

Answer 1

你不打印任何空格。

System.out.print(mid + " ");

编辑：

此外，您每次通过内部循环开始mid 0，而不是在low开始。

Answer 2

System.out.print(mid + " ");

和

System.out.println(" ");

应该修复你。

编辑：哦......好吧，那个和：

for (int mid = low; mid<=high; mid++)

Answer 3

您可能希望将空格连接到System.out调用。

System.out.print( mid + " " );

Answer 4

在内循环中设置mid = low。

Answer 5

你想设置mid = low，并打印其他人注意到的空格：

int high=10;

for( int low =0; low <=high; low++)
    for (int mid=low; mid<=high; mid++)
    {
        System.out.print("%d ", mid);

    }
    System.out.println();
 }

编辑：删除了虚假的\ n。

Answer 6

以下代码将执行

int high = 10;
    for (int low = 1; low <= high; low++) {
        for (int mid = low; mid <= high; mid++) {
            System.out.print(mid + " ");
        }
        System.out.println();
    }
}

Answer 7

我希望这能让你得到你想要的东西：

public class Test
{
    public static void main (String[] args)
    {

    int high=10;

    for( int low =0; low <=high; low++)
    {
        for (int mid=low; mid<=high; mid++) //start from low not 0
        {
            System.out.print(mid+" ");

        }
        System.out.println();

    }
    }
}

Answer 8

试试这个

public class Test {
    public static void main (String[] args) {

    int high=10;

    for( int low =0; low<=high; low++) {

        for (int mid=low; mid<=high; mid++) {
            System.out.print(mid + " " );

        }

        System.out.println();
    }
  }
}

Java中的for循环输出错误

8 个答案: