Compilare: user.cpp: In function ‘void read()’: user.cpp:18: warning: format ‘%d’ expects type ‘int*’, but argument 2 has type ‘char*’ user.cpp:17: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void print()’: user.cpp:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void build_graph(std::vector<char, std::allocator<char> >*)’: user.cpp:48: warning: array subscript has type ‘char’ user.cpp: In function ‘void build_gt(std::vector<char, std::allocator<char> >*)’: user.cpp:60: warning: array subscript has type ‘char’ user.cpp: In function ‘void BFS()’: user.cpp:82: warning: array subscript has type ‘char’ user.cpp:82: warning: array subscript has type ‘char’ user.cpp:82: warning: array subscript has type ‘char’ user.cpp:85: warning: array subscript has type ‘char’ user.cpp:85: warning: array subscript has type ‘char’ user.cpp: In function ‘void BFS_back()’: user.cpp:106: warning: array subscript has type ‘char’ user.cpp:106: warning: array subscript has type ‘char’ user.cpp:106: warning: array subscript has type ‘char’ user.cpp:106: warning: array subscript has type ‘char’