Compilare: user.cpp: In function ‘int Sum()’: user.cpp:30:12: warning: ‘suma’ may be used uninitialized in this function [-Wmaybe-uninitialized] return suma; ^~~~ user.cpp: In function ‘void Back(int)’: user.cpp:26:9: warning: ‘suma’ may be used uninitialized in this function [-Wmaybe-uninitialized] int suma; ^~~~