---

Lỗi biên dịch:

Main.c:4:14: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token
 int nhap(int &n)
              ^
Main.c: In function ‘main’:
Main.c:20:2: warning: implicit declaration of function ‘nhap’; did you mean ‘nan’? [-Wimplicit-function-declaration]
  nhap(n);
  ^~~~
  nan