Compilare: user.cpp: In function ‘int z1(int&)’: user.cpp:34:13: warning: ‘mb’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (mb%2==0 && nb%2==0) ^ user.cpp: In function ‘int z2(int&)’: user.cpp:60:13: warning: ‘mb’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (mb%2==0 && nb%2==0) ^ user.cpp: In function ‘int z3(int&)’: user.cpp:86:13: warning: ‘mb’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (mb%2==0 && nb%2==0) ^ user.cpp: In function ‘int z4(int&)’: user.cpp:112:13: warning: ‘mb’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (mb%2==0 && nb%2==0) ^