why do i receive an error message when i change phonebook.c in matlab to phonebook.cpp? with mex

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se chss 2023-11-15

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https://ww2.mathworks.cn/matlabcentral/answers/2047612-why-do-i-receive-an-error-message-when-i-change-phonebook-c-in-matlab-to-phonebook-cpp-with-mex

回答： Angelo Yeo 2023-11-16

if i change the phonebook.c example in matlab to phonebook.cpp, i receive an error message.

the error message line is 49.

classid flags = mx calloc(fields, sizeof(mx classid));

it seems that the mxcalloc function can only be used in c.

is there a way to use it in the cpp extension as well?

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Answer 1

Angelo Yeo 2023-11-16

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https://ww2.mathworks.cn/matlabcentral/answers/2047612-why-do-i-receive-an-error-message-when-i-change-phonebook-c-in-matlab-to-phonebook-cpp-with-mex#answer_1353372

在 MATLAB Online 中打开

The "phonebook.c" is composed of lots of C APIs for MATLAB (e.g., mxGetClassID), and you cannot change the extention to cpp to use it on the fly. You can find a cpp version of the "phonebook" example with the command below. Please find how it is different from the C version.

edit([matlabroot '/extern/examples/cpp_mex/phonebook.cpp'])