function return type is vector in c++

i want vector as return type of function in my code like,

class SocketTransportClient{
    void sendData(RMLInfoset *info){
        vector<unsigned long>::iterator blockIterator;
        vector<unsigned long> vectBlock=info->getRML(); // error :  error C2440: 'initializing' : cannot convert from 'std::vector<_Ty>' to 'std::vector&l开发者_Python百科t;_Ty>'
    }
}

class RMLInfoset  {
    vector<unsigned int> RMLInfoset::getRML(){
        return  vectDataBlock;
    }
}

but it show an error 'cannot convert from 'std::vector<_Ty>' to 'std::vector<_Ty>' ' so please any one help me, Thanks.

Well, part of the problem is that you never actually build the vector v in Myfun.

std::vector<int> Myfun() {
  std::vector<int> v;
  return v;
}

EDIT:

After the question edit, there is still a small problem - you need to declare the vector as a std::vector<int>, not just a vector<int>, as above. This is because vector resides in the std namespace.

Your function is declared to return vector<unsigned int> but you're actually trying to assign the result to a vector<unsigned long>. Those are different types and not assignment-compatible. Change your function declaration:

  vector<unsigned long> RMLInfoset::getRML(){

You will also need to change the type of vectDataBlock. Basically, decide which vector type you want to use and be consistent.

You have three errors

1) You didn't use #include <vector>

2) It should be std::vector<int> v; instead of vector<int> v;

3) You didn't post all of your code.