當您從其他課程中創建一個課程時，它會被稱爲什麼？

Question

我最近學習C＃並理解基礎知識。我不寫下面的代碼，但試圖理解它。線類在聲明開始和結束字段時使用Point。這在C＃中調用了什麼？

public class Point 
{ 
    private float x; 

    public float X 
    { 
     get { return x; } 
     set { x = value; } 
    } 
    private float y; 

    public float Y 
    { 
     get { return y; } 
     set { y = value; } 
    } 

    public Point(float x, float y) 
    { 
     this.x = x; 
     this.y = y; 
    } 

    public Point():this(0,0) 
    { 
    } 

    } 

} 

class Line 
{ 
    private Point start; 

    public Point Start 
    { 
     get { return start; } 
     set { start = value; } 
    } 

    private Point end; 

    public Point End 
    { 
     get { return end; } 
     set { end = value; } 
    } 

    public Line(Point start, Point end) 
    { 
     this.start = start; 
     this.end = end; 
    } 

    public Line():this(new Point(), new Point()) 
    { 
    } 

Answer 1

我不確定你問什麼，但我想你想知道正確的術語：

public class Point // a class (obviously) 
{ 
    private float x; // private field; also the backing 
        // field for the property `X` 

    public float X // a public property 
    { 
     get { return x; } // (public) getter of the property 
     set { x = value; } // (public) setter of the property 
          // both are using the backing field 
    } 


    public float Y // an auto-implemented property (this one will 
    { get; set; } // create the backing field, the getter and the 
        // automatically, but hide it from accessing it directly) 

    public Point(float x, float y) // constructor 
    { 
     this.x = x; 
     this.Y = y; 
    } 

    public Point() // a default constructor that calls another by 
     : this(0,0) // using an "instance constructor initializer" 
    {} 
}