似乎至少调用了DLL中的函数.但是当然，如​​果函数需要3个参数，则调用

It seems the function in the DLL is at least called. But of course if the function expects 3 Parameters the call

a.sumab(2,5);

会产生错误.通常在matlab中，如果要从函数返回值，可以将其称为

will produce an error. Usually in matlab if you want a return value from a function you call it

s = a.sumab(2, 5); 

，因为matlab没有参考参数.

我认为您应该重写您的Matlab函数，使其仅包含2个参数，并且当然会返回结果总和.

参见例如:
http://thinkmetric.com/tuts/matlab/functions.html [

since matlab doesnt have reference parameters.

I think you should rewrite your Matlab function so that it only excepts 2 parameters and of course returns the result sum.

See for example:
http://thinkmetric.com/tuts/matlab/functions.html[^]

But then again why even use Matlab for such a simple task...