Compilare: user.c: In function ‘main’: user.c:52:20: warning: unused variable ‘dist’ [-Wunused-variable] double dist = distance(x1, y1, cx, cy); ^ user.c:34:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri5.in", "r", stdin); ^ user.c:35:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cercuri5.out", "w", stdout); ^ user.c:38:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i", &t); ^ user.c:42:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &r, &m); ^ user.c:47:18: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%lf%lf", &x1, &y1, &x2, &y2); ^