Compilare: user.cpp: In function ‘int main()’: user.cpp:61:11: warning: unused variable ‘x’ [-Wunused-variable] int n,x,y,dx,dy,k,cx,cy; ^ user.cpp:61:13: warning: unused variable ‘y’ [-Wunused-variable] int n,x,y,dx,dy,k,cx,cy; ^ user.cpp: In function ‘int romb(double, double, double, double, double)’: user.cpp:58:1: warning: control reaches end of non-void function [-Wreturn-type] } ^