Compilare: user.c: In function ‘main’: user.c:28:16: warning: unused variable ‘j’ [-Wunused-variable] int n, i, d, j, f, a, b, m; ^ user.c:30:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", &n, &m ) ; ^ user.c:35:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &a, &b, &d ) ; ^