Borderou de evaluare (job #540566)

Compilare: user.cpp: In function ‘void shiftare(std::string&)’: user.cpp:25:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void expresie(std::string)’: user.cpp:46:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp:52:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp: In function ‘void scrie(std::string)’: user.cpp:57:48: warning: array subscript has type ‘char’ [-Wchar-subscripts]