Compilare: user.c: In function ‘read’: user.c:29:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:33:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &vec[ i ]); ^ user.c: In function ‘write’: user.c:77:13: warning: ‘pos’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d ", vec[pos]); ^