Compilare: user.cpp:107:2: warning: no newline at end of file user.cpp: In function 'void critice(int, int)': user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'void bell()': user.cpp:51: warning: comparison between signed and unsigned integer expressions user.cpp: In function 'int main()': user.cpp:86: warning: comparison between signed and unsigned integer expressions