---

Lỗi biên dịch:

Main.cc: In function ‘int demHop3(char*, int)’:
Main.cc:14:13: error: ‘dem’ was not declared in this scope
   14 |             dem++;
      |             ^~~
Main.cc:17:12: error: ‘dem’ was not declared in this scope
   17 |     return dem;
      |            ^~~
Main.cc:6:9: warning: unused variable ‘count’ [-Wunused-variable]
    6 |     int count = 0;
      |         ^~~~~