Eroare de compilare: user.c: In function ‘main’: user.c:12:15: error: ‘T’ undeclared (first use in this function) scanf("%d", &T); ^ user.c:12:15: note: each undeclared identifier is reported only once for each function it appears in user.c:15:19: error: ‘A’ undeclared (first use in this function) scanf("%d %d", &A, &B); ^ user.c:15:23: error: ‘B’ undeclared (first use in this function) scanf("%d %d", &A, &B); ^ user.c:9:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.in", "r", stdin); ^ user.c:10:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.out", "w", stdout); ^