I have found a lot of pdf files about Ethereum smart contract and JavaScript cryptocurrency. I still want to know about resources such as C++ cryptocurrency. Let me know about some good resources.
The best pdf about bitcoins would be the original white paper by Satoshi Nakamoto https://bitcoin.org/bitcoin.pdf
For programming free ressources I invite you there: https://www.lopp.net/bitcoin-information/developer-tools.html
Then you have some great book like "mastering bitcoin" or "programming bitcoin"
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I also searching some tutorials about C++ cryptocurrency (create block /POS or POW/wallet and block explore.) – kyaw swar Sep 21 '19 at 16:07