how to translate the data in .bin file based on C++?

[KKevinTso]

I want to transform the data in a bin file into a mcap file, and the data in the bin file can be translated by C++ struncts defined in C++ header files. Now i have written some codes to read the bin file and got the exact value of each signal in 10 seconds (stored in a vector, just for example), then what is the next step?
The bin data has nothing to do with ros, is's just a collected via internal developed software.
Thanks!