[z1995z]

Im bit confused writing title. If Im wrong then please correct me.

What I want to do is to convert this peace of code to C#

Code

vector2d vector2d::operator*( double num )
{
    vector2d v;
    v.x = num  * x;
    v.y = num  * y;
    return v;
}

double vector2d::operator*( vector2d vec )
{
    return vec .x*x+vec.y*y;
}

vector2d vector2d::operator+(vector2d vec )
{
    vector2d ans;
    ans.x = x + vec.x;
    ans.y = y + vec.y;
    return ans;
}

vector2d vector2d::operator-(vector2d vec )
{
    vector2d ans;
    ans.x = x - vec.x;
    ans.y = y - vec.y;
    return ans;
}

vector2d vector2d::operator-(double num)
{
    vector2d ans;
    ans.x = x - num;
    ans.y = y - num;
    return ans;
}

Its from simple vector2d class. Im making same Vector2D class in C# so I want these functions/methods and I want it to work the same way as it worked in C++.

Seems that I can do - and + operators

Something like this:

Code

Vector2D operator -(Vector2D vec)
{
    Vector2D ans = null ;
    ans.x = x - vec.x;
    ans.y = y - vec.y;
    return ans;
}

But I cant do * operator. It says "Overloadable unary operator expected".
I get this error here:

Code

public double operator *( Vector2D w )
{
    return w.x*x+w.y*y;
}

I have simple multiply methods but it makes my code unreadable so Im trying to convert and use these methods from c++.

[Forecraft]

You could easily find this with a simple Google query.

[Odus]

Something like:

Code

public static Vector operator *(Vector v1, double num) =>
    new Vector(v1.X * num, v1.Y * num);

Assuming your constructor works like this. If not, just declare a new type and set the properties and return like you do above.

[Forecraft]

You are lucky that people are willing to spoon feed you.

[Odus]

You are lucky that people are willing to spoon feed you.

OP was on the right track and explained his needs well. My code's syntax sugar aside, there isn't much difference between them. Only the corrected version.

[z1995z]

Something like:

Code

public static Vector operator *(Vector v1, double num) =>
    new Vector(v1.X * num, v1.Y * num);

Assuming your constructor works like this. If not, just declare a new type and set the properties and return like you do above.

Oh, now I understand. Thanks!