MATLAB to CPP code

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Mikhun Wong 2024-5-28

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https://ww2.mathworks.cn/matlabcentral/answers/2123431-matlab-to-cpp-code

回答： arushi 2024-5-28

In MATLAB, it is quite convenient to implement reading binary files with data types that are not several-integer-number of bytes, like

data = fread(fid, fsize, 'bit12');

I feel extremely frustrated about how to correctly convert this expression to C++ code?

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Answer 1

arushi 2024-5-28

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Hi Mikhun,

When dealing with non-standard data types like a 12-bit number which isn’t natively supported in C++. In MATLAB, fread with 'bit12' allows you to read data as 12-bit units directly, but in C++, you may need to read the data into a larger standard type and then extract the 12-bit values manually.Read the data into an array of a standard data type that is larger than 12 bits, such as uint16_t (16 bits) and then extract the 12-bit values from the array of 16-bit numbers.

Hope this helps.