Compilare: user.cpp: In function ‘int drum(int)’: user.cpp:16:11: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r; ^ user.cpp: In function ‘int main()’: user.cpp:42:13: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( rx == ry ) ^ user.cpp:42:13: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:34:25: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] tata[ry] = x; ^