Compilare: user.cpp: In function ‘void read()’: user.cpp:46:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &t); ^ user.cpp:50:89: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %lf %lf %lf %lf %d", &a.x, &a.y, &a.z, &b.x, &b.y, &b.z, &v[i].s); ^ user.cpp:52:40: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] V[i] = Cloud{a, b, s, v[i].vol}; ^