You can obtain patents for the technical functions that the program code creates if the program meets the following requirements: 

• it can be applied industrially. This means that what happens when the code or program is executed has a technical effect.
• it is novel
• it is inventive. The difference compared with previous solutions must be significant.

Remember that

• the copyright concerns the code you have written – the literary work which constitutes the algorithms.
• it is relatively easy for a programmer to write an identical program but in a way which does not necessarily infringe the copyright for the first work.
• if your code contains technical functions, it may be appropriate to register a patent for those particular functions in order to protect your innovation.