Borderou de evaluare (job #3834)

Compilare: user.c: In function ‘main’: user.c:42:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:44:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c: In function ‘afisare’: user.c:19:1: warning: control reaches end of non-void function [-Wreturn-type] user.c: In function ‘main’: user.c:43:5: warning: ‘a’ is used uninitialized in this function [-Wuninitialized]