CString Split C++

CString.cpp

#include <string>
#include <sstream>
#include <iostream>
#include <vector>

#include "cstring.h"

using namespace std;

void CString::split(std::vector<CString>& strings)
    {
    stringstream ss;
    ss << m_string;
    while(!ss.eof())
        {
        string out;
        ss >> out;
        strings.push_back(out);
        } 
    }

std::ostream& operator<<(std::ostream& os, const CString& str)
    {
    os << str.m_string;
    return os;
    }
    
std::istream& operator>>(std::istream& os, CString& str)
    {
    os >> str.m_string;
    return os;
    }

CString.h

class CString
{
public:
    CString ()
    :m_string("")
    {
    }
    
    CString (std::string str)
    :m_string(str)
    {
    }
    
    CString(const char str[])
    :m_string(str)
    {
    }

public:
    void split(std::vector<CString>& strings);
    
    friend std::ostream& operator<<(std::ostream& os, const CString& str);
    friend std::istream& operator>>(std::istream& os, CString& str);
    
private:
    std::string m_string;
};

std::ostream& operator<<(std::ostream& os, const CString& str);
std::istream& operator>>(std::istream& os, CString& str);

main.cpp

#include <iostream>
#include <vector>
#include "cstring.h"

using namespace std;

int main()
{
    CString str = "What is your name";
    vector<CString> strings;
    str.split(strings);
    for(auto s : strings){
        cout << s << endl;    
    }
    
    return 0;
}