Compilare: user.cpp: In function ‘void ins(nod*, char*)’: user.cpp:32: warning: array subscript has type ‘char’ user.cpp:34: warning: array subscript has type ‘char’ user.cpp:36: warning: array subscript has type ‘char’ user.cpp:39: warning: array subscript has type ‘char’ user.cpp: In function ‘void del(nod*, char*)’: user.cpp:54: warning: array subscript has type ‘char’ user.cpp:55: warning: array subscript has type ‘char’ user.cpp:62: warning: array subscript has type ‘char’ user.cpp:62: warning: array subscript has type ‘char’ user.cpp:64: warning: array subscript has type ‘char’ user.cpp:65: warning: array subscript has type ‘char’ user.cpp: In function ‘void afi(nod*, char*)’: user.cpp:79: warning: array subscript has type ‘char’ user.cpp:80: warning: array subscript has type ‘char’ user.cpp: In function ‘void pre(nod*, char*, int)’: user.cpp:88: warning: array subscript has type ‘char’ user.cpp:93: warning: array subscript has type ‘char’ user.cpp: In function ‘int main()’: user.cpp:98: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:99: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result