Im trying to use bitwise xor in c++. However my program doesnt like it. Here is a picture of the code:

I get the following error:

//cbc.h #ifndef CBCH - #define CBCH - #include include #include class cbc public: cbc (std: :string K, std::string I); std::string e(std::string t); std: :string d(std::string t); private: std::string a"Yeppers" std::int key0; #endif