Compilare: user.cpp: In function ‘int main()’: user.cpp:19:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:21:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &v[i].x, &v[i].y); ^ user.cpp:37:27: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] rez += sqrt(1.0 * bt[p]); ^