Compilare: user.cpp: In function ‘int main()’: user.cpp:38:13: warning: unused variable ‘g’ [-Wunused-variable] int g=0; ^ user.cpp:204:36: warning: ‘y3’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x3<<' '<<y3<<"\n"; ^~~~ user.cpp:211:36: warning: ‘y2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x2<<' '<<y2<<"\n"; ^~~~ user.cpp:213:36: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x1<<' '<<y1<<"\n"; ^~~~ user.cpp:204:27: warning: ‘x3’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x3<<' '<<y3<<"\n"; ^~~ user.cpp:211:27: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout<<x2<<' '<<y2<<"\n"; ^~~