Compilare: user.c: In function ‘main’: user.c:8:35: warning: unused variable ‘a’ [-Wunused-variable] int n, k, i, l1 = 0, l2 = 0, m, a, sum, tr; ^ user.c:12:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d%d", &n, &k ); ^ user.c:14:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf ( fin, "%d", &v[i] ); ^