Question

public class ExperienceTable
{
    public static int MaxExperiencePoints;
    public static double PercentToNextLevel;

    public static void checkLevel(Hero player)
    {
        if (player.ExperiencePoints >= 0)
        {
            player.Level = 1;
            MaxExperiencePoints = 15;
            PercentToNextLevel = player.ExperiencePoints / MaxExperiencePoints;
        }
    }

然后使用以下方法将其绘制到屏幕上：

        GameRef.SpriteBatch.DrawString(GUIFont, "" + ExperienceTable.PercentToNextLevel, new Vector2((int)player.Camera.Position.X + 1200, (int)player.Camera.Position.Y + 676), Color.White);

小数点如何显示？似乎数字正在四舍五入。

Answer 1

默认情况下，如果double首先是一个舍入的数字，则不会显示小数位。我猜player.ExperiencePoints是int。并且int除以另一个int将始终生成int，从而产生舍入值。

假设player.ExperiencePoints实际上是int，并且您希望在分割时获得分数，则应将分割线更改为以下内容：

PercentToNextLevel = (double) player.ExperiencePoints / MaxExperiencePoints;

如果您希望显示小数位数.00，请将ExperienceTable.PercentToNextLevel更改为以下内容。

ExperienceTable.PercentToNextLevel.ToString("0.00")

.ToString("0.00")会将double值转换为包含2位小数的字符串，如果必须，则将其舍入到两位小数。

Answer 2

我认为

PercentToNextLevel = player.ExperiencePoints / MaxExperiencePoints;

是整数除法（如果player.ExperiencePoints是整数）。

试试：

PercentToNextLevel = (double)player.ExperiencePoints / MaxExperiencePoints;

Answer 3

如果player.ExperiencePoints也是int，那么您将整数除以整数，结果是舍入整数。相反，使用

PercentToNextLevel = (double)player.ExperiencePoints / MaxExperiencePoints

绘制一个双精度并显示小数位？

3 个答案: