How to create a pointer on a struct?

Question

Andreas Schwager 2017-2-21

回答： Philip Borghesani 2017-2-21

Hi,

reading the Documentation from libstruct, there is following example:

double addStructFields(c_struct) sm.p1 = 476; sm.p2 = -299; sm.p3 = 1000; sc = libstruct('c_struct',sm)

Executing these lines on my Matlab there is following error Message:

Error using feval Undefined function 'lib.c_struct' for input arguments of type 'struct'.

Error in libstruct (line 16) ptr=feval(['lib.' structtype],initialvalue);

Why ? How to fix?

Thanks

Answer 1

Philip Borghesani 2017-2-21

MATLAB does not know what a c_struct is without loading the library. Load the library first using the code from the example:

if not(libisloaded('shrlibsample'))
  addpath(fullfile(matlabroot,'extern','examples','shrlib'))
  loadlibrary('shrlibsample')
end