C ++构造函数错误-预期在标记'<'之前的'）'

Question

What is wrong wit the following constructor declaration? I keep getting this error:

Expected ')' before token '<'

class Environment{
    public:
        Environment(vector<vector<char> > roomData);


     private:
         //....
};

Note: ok I see what's wrong. I did not add: using namespace std;

Answer 1

What's vector ? If it is supposed to be std::vector , then did you include <vector> ? And it is std::vector , not just vector , unless you have the corresponding using declaration or directive somewhere higher in the code.