Compilare: user.cpp: In function ‘int main()’: user.cpp:94:17: warning: variable ‘x2’ set but not used [-Wunused-but-set-variable] int x1, x2, d = 0, diameter = 0; ^ user.cpp:124:17: warning: variable ‘x2’ set but not used [-Wunused-but-set-variable] int x1, x2, d = 0, diameter = 0; ^ user.cpp:140:13: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( j != x1 && d < D[ E[i].y ][j] ) ^ user.cpp:110:13: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if ( j != x1 && d < D[i][j] ) ^