Eroare de compilare: user.c:4: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token user.c: In function ‘main’: user.c:36: warning: implicit declaration of function ‘gcd’ user.c:23: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:24: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:27: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:30: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result