[Solved] Writing void pointer to binary file

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Is it possible that in different program executions the code above is not going to work?

Yes, it’s about as possible as 1+1==2.

Is this correct?

Absolutely.

How can I solve the problem?

Write and read the array rather than its address:

vl_size size = vl_get_type_size(dataType);
const void *means = vl_gmm_get_means(gmm)
out.write(static_cast<const char*>(means), numComponents * dimension * size);

/// ...

vl_size size = vl_get_type_size(dataType);
void *means = vl_calloc (numComponents * dimension, size) ;
in.read(static_cast<char*>(means), numComponents * dimension * size);

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solved Writing void pointer to binary file