Compilare: user.c: In function ‘main’: user.c:7:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:9:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ user.c:23:12: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%d %d %d", st + 1, dr + 1, max * 2); ^ user.c:23:12: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized]