How to organize joint work of batch file and cpp file?

Question

C++ / C#

Task: You need to write a batch file, which will take a text file as input, which contains data separated by the characters ";" and ":" , and using the cpp file to combine the data separated by " ; " into lines, and the data separated by ":" into separate text files.
I ask experienced people to give direction, because I don’t even know where to start and what to use. Thank you.