Eroare de compilare: user.c: In function ‘BEZOUT’: user.c:18:12: error: ‘d’ undeclared (first use in this function) return d; ^ user.c:18:12: note: each undeclared identifier is reported only once for each function it appears in user.c:12:15: warning: variable ‘D’ set but not used [-Wunused-but-set-variable] int x, y, D; ^ user.c:19:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:25:13: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("euclid3.in", "r", stdin); ^ user.c:26:13: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen ("euclid3.out", "w", stdout); ^ user.c:28:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &lines); ^ user.c:31:15: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &A, &B, &C); ^