Compilare: user.c: In function ‘main’: user.c:9:16: warning: unused variable ‘i’ [-Wunused-variable] int t, n, k, i, sum; ^ user.c:12:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &t); ^ user.c:16:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d ", &n, &k); ^