Using the C++ Math Library

Variable Declaration

In addition to requiring different syntax, C++ insists that you declare all variables explicitly before using them. The declarations do not have to appear at the top of a function as they do in C, but may be interspersed throughout your code.

Declare array variables as type mwArray. Note that in general mwArray objects have value semantics in the MATLAB C++ Math Library. They are passed by value to functions; they are not modified by functions; they are returned by value.

To modify the value of an mwArray object within a function, pass the mwArray object to that function by reference, either as a pointer (mwArray *) or a reference (mwArray &).

Note    If you are a user of the MATLAB Application Program Interface, don't confuse the type mwArray with the mxArray type used in the Application Program Interface Library. Do not declare array variables as type mxArray* unless you really want a pointer to an mxArray.

Syntax

Function Calling Conventions