Compilare: user.cpp: In function ‘void ins(nod*&, char*)’: user.cpp:28: warning: array subscript has type ‘char’ user.cpp:30: warning: array subscript has type ‘char’ user.cpp:33: warning: array subscript has type ‘char’ user.cpp: In function ‘void del(nod*&, char*)’: user.cpp:45: warning: array subscript has type ‘char’ user.cpp:47: warning: array subscript has type ‘char’ user.cpp:47: warning: array subscript has type ‘char’ user.cpp:49: warning: array subscript has type ‘char’ user.cpp:50: warning: array subscript has type ‘char’ user.cpp: In function ‘void que(nod*&, char*)’: user.cpp:64: warning: array subscript has type ‘char’ user.cpp:69: warning: array subscript has type ‘char’ user.cpp: In function ‘void pre(nod*&, char*)’: user.cpp:75: warning: array subscript has type ‘char’ user.cpp:78: warning: array subscript has type ‘char’ user.cpp: In function ‘int main()’: user.cpp:83: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:84: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result