Compilare: user.cpp: In function ‘int main()’: user.cpp:28:64: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 5 has type ‘int*’ [-Wformat=] fscanf(in, "%ld %ld %ld", &a[i].x, &a[i].y, &a[i].r); ^ user.cpp:24:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:28:65: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld %ld %ld", &a[i].x, &a[i].y, &a[i].r); ^