Question

我的文件格式为.txt，坐标如下：

Ver(0.6039f, 0.8431f, 0.8980f)

我需要从Ver(0.6039f, 0.8431f, 0.8980f)新Point3D();

获取最佳方法

public struct Point3D
{
    float x,
          y,
          z;
    public Point3D(float x, float y, float z)
    {
        this.x = x;
        this.y = y;
        this.z = z;
    }
}

Answer 1

你也许可以这样做：

// read the file into an array of strings - consider File.ReadAllLines() - perhaps name the array it produces "fileLines"

// iterate over the fileLines array processing one array element at a time - a good method would be to use a foreach loop
foreach(string fileLine in fileLines)
{
    // TODO: isolate the part of the string between the parenthesis

    // split the string on commas to create a string array
    var coordinates = fileLine.Split(new char[',']);

    // if there the number of string array elements is correct, allocate a Point3D element
    if (coordinates.length != 3)
    {
        throw new ApplicationException(string.Format("Invalid number of coordinates. Expected 3, got {0}.", coordinates.Length));
    }

    // use float.TryParse() to load each element of the string array into the proper member of its struct or class
    float xCoordinate;
    float yCoordinate;
    float zCoordinate;

    if (! float.TryParse(coordinates[0], out xCoordinate)
    {
        throw new ApplicationException(string.Format("Unable to parse X-coordinate {0}.", coordinates[0]));
    }
    if (! float.TryParse(coordinates[1], out yCoordinate)
    {
        throw new ApplicationException(string.Format("Unable to parse Y-coordinate {0}.", coordinates[1]));
    }
    if (! float.TryParse(coordinates[2], out zCoordinate)
    {
        throw new ApplicationException(string.Format("Unable to parse Z-coordinate {0}.", coordinates[2]));
    }
    Point3D point3D = new Point3D(xCoordinate, yCoordinate, zCoordinate);

    // TODO: stuff this point3D into an array or collection to save it

    // process the next line of the file...
}

我会把它作为练习让读者填写评论之间的一些代码。

编辑：我已经回去并填写了一些细节。请注意，此代码的结构和编写不尽可能紧凑，以免混淆读者。

如何从字符串到新的struct实例获得3个浮点？

1 个答案: