Eroare de compilare: user.cpp: In function ‘void bfs()’: user.cpp:11: error: ‘viz’ was not declared in this scope user.cpp:11: error: ‘x’ was not declared in this scope user.cpp:12: error: ‘t’ was not declared in this scope user.cpp:13: error: ‘n’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:30: error: ‘n’ was not declared in this scope user.cpp:30: error: ‘m’ was not declared in this scope user.cpp:30: error: ‘x’ was not declared in this scope user.cpp:30: error: ‘y’ was not declared in this scope user.cpp:31: error: ‘i’ was not declared in this scope user.cpp:33: error: ‘a’ was not declared in this scope user.cpp:33: error: ‘b’ was not declared in this scope user.cpp:33: error: ‘c’ was not declared in this scope user.cpp:34: error: ‘A’ was not declared in this scope user.cpp:34: error: ‘mp’ was not declared in this scope