lex&yacc8--wehter use in C++

bintree.h:12:1: error: unknown type name ‘using’
 using namespace std;
 ==============

bintree.h:28:1: error: unknown type name ‘class’
 class CBintree

==============

the result is that lex&yacc cannot use in C++, i use flex and yacc and gcc to compile the program

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原文地址：https://www.cnblogs.com/orchid-sky/p/3647285.html