Hi i am a future programmer and would like to know how much time will it take me to become good at programming... by sayin good i mean like at least create programs that work for example a simple calculator program.

How long did it take u guys to become good at C/C++

Technically, you could become "good" in several days if you memorize all the functions etc, but part of being good at programming is knowing shortcuts and other ways of doing stuff, which can only come from experience.