Compilare: user.cpp: In function ‘int main()’: user.cpp:26:8: warning: ‘a2’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[a2]=0; ^ user.cpp:27:7: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[b]=0; ^ user.cpp:28:7: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[c]=0; ^ user.cpp:54:8: warning: ‘d’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[d]=0; ^ user.cpp:51:9: warning: ‘a1’ may be used uninitialized in this function [-Wmaybe-uninitialized] {a[a1]=0; ^