Question

嗨，我是初学c＃学习者，据我所知，我在这里做错了什么，但无法弄明白，有谁知道？

namespace translateTelNum
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        String originalContent = "";
        originalContent = box1.Text.ToUpper();

        char[,] charGroup = new char[,]
       {
        {'A','B','C' }, 
        {'D','E','F' },              
        {'G','H','I' }, 
        {'J','K','L' }, 
        {'M','N','O' },
        {'P','R','S' }, 
        {'T','U','V' }, 
        {'W','X','Y' } 
       };

        String numbers = "";

        for (int i = 1; i <= originalContent.Length; i++)
        {
            for (int a = 1; a <= charGroup.Length; a++)
            {
                for (int b = 1; b <= charGroup[a].Length; b++)
                {
                    if (originalContent[i] == charGroup[a][b])
                    {
                        numbers += a + 2;
                    }
                }
            }
            if (i == 2 && i== 7)
            {
                numbers += "-";
            }
        }

        Console.WriteLine(numbers);
    }
}
}

错误＆＃34; []内的索引数量错误;预期2＆＃34;对于以下几行：

for (int b = 1; b <= charGroup[a].Length; b++)
    if (originalContent[i] == charGroup[a][b])

Answer 1

而不是使用

for (int a = 1; a <= charGroup.Length; a++)
{
    for (int b = 1; b <= charGroup[a].Length; b++)
    {
        if (originalContent[i] == charGroup[a][b])

你应该使用

for (int a = 1; a <= charGroup.GetLength(0); a++)
{
    for (int b = 1; b <= charGroup.GetLength(1); b++)
    {
        if (originalContent[i] == charGroup[a,b])

有两件事需要改变。

首先，您应该使用方法charGroup.Length来获取特定维度的长度，而不是使用charGroup[a].Length和GetLength(dimension)。因此，在这种情况下，为了获得行数，您应该使用GetLength(0)并获取应使用GetLength(1)的列数。见documentation of GetLength on MSDN

其次，C＃多维数组由array[index1, index2, ..., indexN]访问，而不是array[index1][index2] ... [indexN]。见documentation on MSDN

还要记住，C＃中的数组索引从0开始，所以很可能你的循环应该从0开始而不是1：

for (int a = 0; a < charGroup.GetLength(0); a++)
{
    for (int b = 0; b < charGroup.GetLength(1); b++)
    {
        if (originalContent[i] == charGroup[a,b])

＆＃34; []内的索引数目错误;预期2＆＃34; C＃中二维数组的错误

1 个答案: