Compilare: user.cpp:24:28: warning: multi-character character constant user.cpp:10: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp: In function ‘void deque()’: user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp:32: warning: unused variable ‘w’ user.cpp:33: warning: ‘sf’ may be used uninitialized in this function user.cpp:33: warning: ‘inc’ may be used uninitialized in this function