Compilare: user.cpp: In function 'void inmult(int)': user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void adun()': user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp:38: warning: comparison between signed and unsigned integer expressions user.cpp:45: warning: comparison between signed and unsigned integer expressions