Thread: Overriding '+' operator

Hello, everyone.

I was wondering is it possible to override the addition operator so that it will take two constants of type char*.

I tried writing the following code but it only gave me an error message stating "'operator +' must have at least one formal parameter of class type".

Code:

char* operator+(const char* left, const char* right)
{
	char* c, *d;
	d = new char[strlen(left) + 1];
	strcpy(d, left);
	c = new char[strlen(left) + strlen(right) + 1];
	c = strcat(d, right);
	return c;
}

So, is it fundamentally impossible to override this operator outside a user defined class, or is there a way to do it?

If so, how?

Thanks.