Compilare: user.cpp: In function ‘int main()’: user.cpp:36:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] fscanf(f, "%d", &output_dim); ^ user.cpp:41:23: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘long int*’ [-Wformat=] fscanf(f, "%d", &aux); ^ user.cpp:48:40: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(fout, "%d\n%d ", input_dim, a1); ^ user.cpp:48:40: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=] user.cpp:52:42: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<long int> >::value_type {aka long int}’ [-Wformat=] fprintf(fout, "%d", output_arr[i] - a1); ^ user.cpp:54:43: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<long int> >::value_type {aka long int}’ [-Wformat=] fprintf(fout, "%d ", output_arr[i] - a1); ^ user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &output_dim); ^ user.cpp:41:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &aux); ^