struct-example-2.cs

public struct Vector3 {
    public float x;
    public float y;
    public float z;

    public Vector3() {  // 編譯錯誤，結構無法包含明確無參數的建構函式
        x = y = z = 0;
    }

    public Vector3( float x, float y, float z ) {
        this.x = x;
        this.y = y;
        this.z = z;
    }
}