Compilare: user.cpp: In function ‘int main()’: user.cpp:42:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( v1 [ 0 ] != v2 [ 0 ] ) ^ user.cpp:11:14: warning: variable ‘x1’ set but not used [-Wunused-but-set-variable] int n1 , x1 , x2 ; ^ user.cpp:43:9: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( x2 != v2 [ 0 ] ) ^