create ex_4_addresses.cpp

create ex_2_Counter.cpp

create ex_1_calculator.cpp

create ex_3_struct_output.cpp

create ex_2_account.cpp

create ex_1_months.cpp

fix: mem leaks in main during array elimination

fix: no leakes detected

fix: smth

fix: some minor changes

fix: in main used sstream to initialize frame

fix: memory leaks issues are resolved

feat: tests passed. First release

fix: dealing with new cells

feat: structure updated