Borderou de evaluare (job #548041)

Compilare: user.c: In function ‘main’: user.c:12:21: warning: unused variable ‘r’ [-Wunused-variable] user.c:13:16: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:14:16: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:16:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:17:36: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]