Borderou de evaluare (job #44399)

Compilare: user.c: In function ‘main’: user.c:16:22: warning: the comparison will always evaluate as ‘false’ for the address of ‘x’ will never be NULL [-Waddress] user.c:7:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:8:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:10:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]