Compilare: user.cpp: In member function ‘InputReader& InputReader::operator>>(char*)’: user.cpp:42:24: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[pointer] = NULL; ^ user.cpp:43:9: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In constructor ‘Aho::Aho()’: user.cpp:68:40: warning: passing NULL to non-pointer argument 2 of ‘void* memset(void*, int, size_t)’ [-Wconversion-null] memset(sons, NULL, sizeof(sons)); ^ user.cpp: In function ‘int main()’: user.cpp:126:21: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> text + 1; ^ user.cpp:132:25: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] cin >> word + 1; ^