Second part of seventh task in EPAM BelSUT Training.
I learned recursion, recursive file renaming. Program creates recursively a renamed folders (ADC_ + original name) in /out directory, changes contents of files and saves each file in the renamed subdirectory in /out (with _ADC_ in name of file). The program prints every renamed folder and every renamed file with hierarchical indent in console.
I have created a multithreaded version of this program, see: task07_2_alternative.