Eroare de compilare: user.c: In function ‘euclid’: user.c:4:9: error: ‘x’ undeclared (first use in this function) x=x+y; \ ^ user.c:11:21: note: in expansion of macro ‘swap’ if(a<b) swap(a,b) ^ user.c:4:9: note: each undeclared identifier is reported only once for each function it appears in x=x+y; \ ^ user.c:11:21: note: in expansion of macro ‘swap’ if(a<b) swap(a,b) ^ user.c:4:13: error: ‘y’ undeclared (first use in this function) x=x+y; \ ^ user.c:11:21: note: in expansion of macro ‘swap’ if(a<b) swap(a,b) ^ user.c: In function ‘main’: user.c:27:8: error: ‘i’ undeclared (first use in this function) for(i=1;i<=T;i++) ^ user.c:29:23: error: ‘a’ undeclared (first use in this function) scanf("%d%d",&a,&b); ^ user.c:29:26: error: ‘b’ undeclared (first use in this function) scanf("%d%d",&a,&b); ^ user.c:23:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.in","r",stdin); ^ user.c:24:11: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("euclid2.out","w",stdout); ^ user.c:25:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^