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Function return types in Matlab Coder

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Kara657
Kara657 2023-6-14
评论： Kara657 2023-6-15
Hello, I am investigating the Matlab Coder functionality. I have 2 quick questions let's say I have the following function in Matlab:
function int_point = my_cross(line1,line2)
int_point = cross(line1,line2);
end
The corresponding C++ function generated by the coder is the following:
void my_cross(const double line1[3], const double line2[3], double int_point[3])
{
int_point[0] = line1[1] * line2[2] - line2[1] * line1[2];
int_point[1] = line2[0] * line1[2] - line1[0] * line2[2];
int_point[2] = line1[0] * line2[1] - line2[0] * line1[1];
}
Question 1) Is there a way to have the c++ function having return type double instead of returning as parameter?
Question 2) In the generated c++ function where my_cross is called the parameters are passed by pointer but I want to pass by value. Can I change this behaviour?
Thanks.

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回答（1 个）

Mukund Sankaran
Mukund Sankaran 2023-6-14
Hello,
This doc page provides some insight into what you are observing: https://www.mathworks.com/help/coder/gs/differences-in-the-appearance-of-generated-code-and-matlab-code.html
Another similar question was posed a while ago, and the answer there contains some more specifics as well: https://www.mathworks.com/matlabcentral/answers/781348-matlab-coder-generated-a-c-function-which-has-void-output-even-though-the-matlab-function-has-doubl
Hope this helps!

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