Compilare: user.cpp: In function 'void citire()': user.cpp:15: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void dynamic()': user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp:26: warning: comparison between signed and unsigned integer expressions user.cpp:27: warning: comparison between signed and unsigned integer expressions user.cpp:44: warning: comparison is always false due to limited range of data type user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp:60: warning: comparison between signed and unsigned integer expressions