where to find source code to calculation option greeks?

I want to find source code, preferred in java or c, that shows how to calculate option volatility and Greeks. any one knows where I can download?

 

QuantLib or search github

 

chatgpt will write it for you. i had it write an implied vol calculator in VBA. it was better that my implementation.

 

I downloaded it from here:https://github.com/bret-blackford/black-scholes