Compilare: user.cpp: In function ‘int main()’: user.cpp:14:13: warning: unused variable ‘s’ [-Wunused-variable] int16_t s=1; ^ user.cpp:31:100: warning: ‘inter’ may be used uninitialized in this function [-Wmaybe-uninitialized] if((v[j+1].x*v[j].y+v[j].x*y+x*v[j+1].y-x*v[j].y-y*v[j+1].x-v[j].x*v[j+1].y)>0) inter++; ^