Eroare de compilare: user.cpp: In function ‘int bfs()’: user.cpp:11: error: ‘memset’ was not declared in this scope user.cpp:20: warning: comparison between signed and unsigned integer expressions user.cpp:30: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:73: error: ‘abs’ was not declared in this scope user.cpp:82: error: ‘abs’ was not declared in this scope user.cpp:46: warning: unused variable ‘j’ user.cpp:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result