using System;

public class Program

{

    public static void Main()

    {

        Vector3 myVector = new Vector3(3.5, 0.7, 2);

        myVector.Floor();

        Console.WriteLine(myVector);

    }

}

​

public struct Vector3

{

    public double x, y, z;

​

    public Vector3(double x, double y, double z)

    {

        this.x = x;

        this.y = y;

        this.z = z;

    }

    public override string ToString()

    {

        return $"{x} | {y} | {z}";

    }

}

​

public static class Extensions

{

    public static void Floor(ref this Vector3 vector)

    {

        vector.x = Math.Floor(vector.x);

        vector.y = Math.Floor(vector.y);

        vector.z = Math.Floor(vector.z);

    }

}