Compilare: user.cpp: In function ‘int main()’: user.cpp:46:63: warning: too many arguments for format [-Wformat-extra-args] fscanf(f, "%d", &v[i].a.x, &v[i].a.y, &v[i].b.x, &v[i].b.y); ^ user.cpp:44:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:46:64: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &v[i].a.x, &v[i].a.y, &v[i].b.x, &v[i].b.y); ^