Question

所以我正在为我的C＃类构建一个乘法表。我已经完成了表的代码，它的工作方式与广告一样。问题是我需要一个动态变化的顶部边框，因为该表格与用户为宽度数字输入的数字一样宽，间距为5个字符。有什么想法吗？

    static void Main(string[] args)
    {
        int width, height;
        //int tableWidth;

        Console.Write("How wide do we want the multiplication table? ");
        width = Convert.ToInt32(Console.ReadLine());

        Console.Write("How high do we want the multiplication table? ");
        height = Convert.ToInt32(Console.ReadLine());

        Console.Write("    x|");

        for (int x = 1; x <= width; x++)
            Console.Write("{0, 5}", x);


            Console.WriteLine();




        for (int row = 1; row <= height; row++)
        {
            Console.Write("{0, 5}|", row);
            for (int column = 1; column <= height; ++column)
            {
                Console.Write("{0, 5}", row * column);
            }
            Console.WriteLine();
        }
        Console.ReadLine();
    }

我假设需要计算tableWidth，然后Console.Write("_")等于总表的宽度。在此先感谢您的帮助：）

Answer 1

你基本上想要将宽度乘以你给出的填充（5）。这样的东西会起作用。请记住，我认为你应该将一些间距分解为变量，因为你在很多地方重复使用像5这样的常量值。 x和管道之前的间距也应该是一个字符串变量，否则很难看到每个空间有多少个空格。这是我的解决方案，保持代码的格式与目前相同：

    Console.Write("    x|");

    for (int x = 1; x <= width; x++)
        Console.Write("{0, 5}", x);

    Console.WriteLine();

    Console.Write("     |");

    for (int x = 1; x <= (width * 5); x++)
        Console.Write("-");


    Console.WriteLine();

制作整个方法：

    static void Main(string[] args)
    {
        int width, height;
        //int tableWidth;

        Console.Write("How wide do we want the multiplication table? ");
        width = Convert.ToInt32(Console.ReadLine());

        Console.Write("How high do we want the multiplication table? ");
        height = Convert.ToInt32(Console.ReadLine());

        Console.Write("    x|");

        for (int x = 1; x <= width; x++)
            Console.Write("{0, 5}", x);

        Console.WriteLine();

        Console.Write("     |");

        for (int x = 1; x <= (width * 5); x++)
            Console.Write("-");

        Console.WriteLine();

        for (int row = 1; row <= height; row++)
        {
            Console.Write("{0, 5}|", row);
            for (int column = 1; column <= height; ++column)
            {
                Console.Write("{0, 5}", row * column);
            }
            Console.WriteLine();
        }
        Console.ReadLine();
    }

Answer 2

这是你的代码改进了命名和顶线绘图（顺便说一下你显示的行不正确 - 你在第二个循环中迭代行而不是列）：

const int columnWidth = 5;
string cellFormat = "{0, " + columnWidth + "}"; 

Console.Write("How wide do we want the multiplication table? ");
int columnsCount = Convert.ToInt32(Console.ReadLine());

Console.Write("How high do we want the multiplication table? ");
int rowsCount = Convert.ToInt32(Console.ReadLine());           

string title = String.Format(cellFormat + "|", "x");
Console.Write(title);

for (int i = 1; i <= columnsCount; i++)
    Console.Write(cellFormat, i);

Console.WriteLine();
int tableWidth = columnWidth * columnsCount + title.Length;
Console.WriteLine(new String('-', tableWidth));

for (int row = 1; row <= rowsCount; row++)
{
    Console.Write(cellFormat + "|", row);

    for (int column = 1; column <= columnsCount; column++)
        Console.Write(cellFormat, row * column);

    Console.WriteLine();
}

下一步重构步骤是提取类和方法：

Console.Write("How wide do we want the multiplication table? ");
int columnsCount = Convert.ToInt32(Console.ReadLine());

Console.Write("How high do we want the multiplication table? ");
int rowsCount = Convert.ToInt32(Console.ReadLine());

MultiplicationTable table = new MultiplicationTable(columnsCount, rowsCount);
table.Draw();

现在代码更清晰了 - 它告诉您有乘法表，并且想要绘制它。绘图很简单 - 您绘制列标题和原始数据：

public class MultiplicationTable
{
    private const int columnWidth = 5;
    private string cellFormat = "{0, " + columnWidth + "}";
    private int columnsCount;
    private int rowsCount;      

    public MultiplicationTable(int columnsCount, int rowsCount)
    {
        this.columnsCount = columnsCount;
        this.rowsCount = rowsCount;
    }

    public void Draw()
    {            
        DrawColumnHeaders();
        DrawRaws();
    }

    private void DrawColumnHeaders()
    {
        string title = String.Format(cellFormat + "|", "x");
        Console.Write(title);

        for (int i = 1; i <= columnsCount; i++)
            Console.Write(cellFormat, i);

        Console.WriteLine();
        int tableWidth = columnWidth * columnsCount + title.Length;
        Console.WriteLine(new String('-', tableWidth));
    }

    private void DrawRaws()
    {
        for (int rowIndex = 1; rowIndex <= rowsCount; rowIndex++)
            DrawRaw(rowIndex);
    }

    private void DrawRaw(int rowIndex)
    {
        DrawRawHeader(rowIndex);

        for (int columnIndex = 1; columnIndex <= columnsCount; columnIndex++)
            DrawCell(rowIndex * columnIndex);

        Console.WriteLine();
    }

    private void DrawRawHeader(int rowIndex)
    {
        Console.Write(cellFormat + "|", rowIndex);
    }

    private void DrawCell(int value)
    {
        Console.Write(cellFormat, value);
    }
}

Answer 3

您需要使用另一个循环，如下所示：

Console.Write("How wide do we want the multiplication table? ");
int width = Convert.ToInt32(Console.ReadLine());
Console.Write("How high do we want the multiplication table? ");
int height = Convert.ToInt32(Console.ReadLine());
Console.Write("    ");
for (int i = 0; i < width; i++) 
    Console.Write("_____");
Console.WriteLine("__");
Console.Write("    x|");
for (int x = 1; x <= width; x++)
    Console.Write("{0, 5}", x);
Console.WriteLine();
for (int row = 1; row <= height; row++)
{
    Console.Write("{0, 5}|", row);
    for (int column = 1; column <= height; ++column)
    {
        Console.Write("{0, 5}", row * column);
    }
    Console.WriteLine();
}
Console.ReadLine();

动态更改顶部边框线C＃

3 个答案: