Compilare: user.c: In function ‘main’: user.c:12:35: warning: unused variable ‘l’ [-Wunused-variable] int n, k, q, x, y, z, i, j=0, l=0; ^ user.c:12:30: warning: unused variable ‘j’ [-Wunused-variable] int n, k, q, x, y, z, i, j=0, l=0; ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d\n%d %d %d %d", &n, &k, &q, &x, &y, &z); ^