-- Yes, you can. Everything can be self learned, it totally depends how quickly you want to handle it.
如自學的話,每個計劃要多久?比如說,按每天看學4小時來算,1個月學一門等等。
-- Every people is different, it depends...
-- Not sure why you pick up this C/C++/Java/C# to spend time on, would you please let us know why?
Thanks!