Compilare: user.cpp: In function ‘int main()’: user.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i< v.size(); i++) ^ user.cpp:46:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<v.size(); i++) ^ user.cpp:28:42: 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:29:44: 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:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:34:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &act.x, &act.y); ^