Eroare de compilare: user.cpp: In function ‘void bt(int)’: user.cpp:13:15: error: ‘ok’ was not declared in this scope if(ok()&&k==n) print(); ^ user.cpp:13:30: error: ‘print’ was not declared in this scope if(ok()&&k==n) print(); ^ user.cpp: In function ‘int main()’: user.cpp:32:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permutari.in","r",stdin); ^ user.cpp:33:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("permutari.out","w",stdout); ^