Add Build a blockchain with C++

README.md

@@ -72,6 +72,7 @@ It's a great way to learn.
 #### Build your own `Blockchain / Cryptocurrency`
 
 * [**ATS**: _Functional Blockchain_](https://beta.observablehq.com/@galletti94/functional-blockchain)
+* [**C++**: _Build a blockchain with C++_](https://davenash.com/2017/10/build-a-blockchain-with-c/)
 * [**C#**: _Programming The Blockchain in C#_](https://programmingblockchain.gitbooks.io/programmingblockchain/)
 * [**Crystal**: _Write your own blockchain and PoW algorithm using Crystal_](https://medium.com/@bradford_hamilton/write-your-own-blockchain-and-pow-algorithm-using-crystal-d53d5d9d0c52)
 * [**Go**: _Building Blockchain in Go_](https://jeiwan.net/posts/building-blockchain-in-go-part-1/)