Eroare de compilare: user.c:9: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token user.c:10: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token user.c:12: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token user.c:23: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token user.c: In function ‘main’: user.c:53: warning: implicit declaration of function ‘succ’ user.c:55: warning: implicit declaration of function ‘valid’ user.c:42: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:43: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:44: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result