Compilare: user.cpp: In function ‘int main()’: user.cpp:48:46: warning: format ‘%Lf’ expects argument of type ‘long double*’, but argument 3 has type ‘double*’ [-Wformat=] fscanf(in, "%Lf%Lf", &v[i].x, &v[i].y); ^ user.cpp:48:46: warning: format ‘%Lf’ expects argument of type ‘long double*’, but argument 4 has type ‘double*’ [-Wformat=] user.cpp:46:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:48:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%Lf%Lf", &v[i].x, &v[i].y); ^