Compilare: user.cpp: In function ‘int main()’: user.cpp:28:44: warning: format ‘%Lf’ expects argument of type ‘long double*’, but argument 3 has type ‘double*’ [-Wformat=] fscanf(si,"%Lf %Lf",&v[i].x,&v[i].y); ^ user.cpp:28:44: warning: format ‘%Lf’ expects argument of type ‘long double*’, but argument 4 has type ‘double*’ [-Wformat=] user.cpp:25:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%d",&n); ^ user.cpp:28:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%Lf %Lf",&v[i].x,&v[i].y); ^