Compilare: user.cpp: In function ‘int main()’: user.cpp:49:22: warning: too many arguments for format [-Wformat-extra-args] scanf("%lf",&x,&y); ^ user.cpp:43:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.in","r",stdin); ^ user.cpp:44:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out","w",stdout); ^ user.cpp:47:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:49:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf",&x,&y); ^ user.cpp:52:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&p[i].x,&p[i].y); ^ user.cpp:68:31: warning: ‘top’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(ccw(p[v[top-1]],p[v[top-2]],p[i])!=-1) ^