Compilare: user.c: In function ‘main’: user.c:17:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^~~~~~~~~~~~~~~~~~~~~ user.c:19:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &A[i]); ^~~~~~~~~~~~~~~~~~~~~~~~ user.c:46:5: warning: ‘index_max’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d %d %d\n", low + 1, index_max + 1, sum_max); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~