Compilare: user.cpp: In function ‘void df1(int)’: user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void scoate()’: user.cpp:42: warning: comparison between signed and unsigned integer expressions user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void df2(int)’: user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void df3(int)’: user.cpp:105: warning: comparison between signed and unsigned integer expressions