What is the meaning of the + in the declaration method?

[Guest]

Hi everyone,

I am learning c# and i don´t understand a piece of code , can anyone
explain the meaning of this code please.

public class vector
{
public double? R = null; //I suppose this is a Generic Type ???
..........

public static vector operator +(vector op1, vector op2) // What is the
meaning of the + ???
{
...........
}
}
}

Thanks in advance

Jolynice

P.S.
My english is not very good i know

 

[Ben Schwehn]

Hello Jolynice,

public double? R = null; //I suppose this is a Generic Type ???

no, it's a nullable type
http://msdn2.microsoft.com/en-us/library/1t3y8s4s(VS.80).aspx

public static vector operator +(vector op1, vector op2) // What is
the
meaning of the + ???

it's an operator overload for operator '+'
http://msdn2.microsoft.com/en-us/library/aa288467(VS.71).aspx

hth
Ben

 

[Hans Kesting]

Hi everyone,

I am learning c# and i don´t understand a piece of code , can anyone
explain the meaning of this code please.

public class vector
{
public double? R = null; //I suppose this is a Generic Type ???
..........
public static vector operator +(vector op1, vector op2) // What
is the
meaning of the + ???
{
...........
}
}
}

Thanks in advance

Jolynice

P.S. My english is not very good i know

This code is defining a new meaning for the "+" operator, when used between
two "vector" types.

So you can use:
vector v1, v2, v3;
v1 = ..;
v2 = ..;
v3 = v1 + v3;


Hans Kestin

 

[Guest]

Hi Ben,

Thanks you ...

I appreciate your answer..

jolynice

 

[Guest]

Hi Hans,

Thank you too for the answer..

jolynice

 

[Michael S]

Hello Jolynice,


no, it's a nullable type

.... that is a Generic Type, Nullable<T>

- Michael Starberg