fingerprint sensor code with c++

[ibiere]

how to create a fingerprint sensor code with c++ from scratch

[CPallini]

Probably you mean 'how to create from scratch a C++ application interfacing a fingerprint sensor module (directly handling the fingerprint sensor would be far more difficult, I suppose). If I got you then you should carefully read the documentation of the module and implement yourself the appropriate communication code. You may also have a look at existing libraries source code (e.g. Arduino).

"In testa che avete, Signor di Ceprano?" -- Rigoletto