Compilare: user.c: In function ‘main’: user.c:33:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.c:36:10: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s, MAXN + 1, in); ^ user.c:71:10: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(out, "%d %d %d", min, l + 1, c + 1); ^ user.c:71:10: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:58:6: warning: ‘c2’ may be used uninitialized in this function [-Wmaybe-uninitialized] bfs(ju, l2, c2, n, m); ^ user.c:58:6: warning: ‘l2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:57:6: warning: ‘c1’ may be used uninitialized in this function [-Wmaybe-uninitialized] bfs(ro, l1, c1, n, m); ^ user.c:57:6: warning: ‘l1’ may be used uninitialized in this function [-Wmaybe-uninitialized]