Help needed with C++ class

[Mike Pliam]

I wrote a little C++ class to implement the parsing of text into matrices. I works pretty well except that I cant seem to access the string vector that holds the numeric data as strings. It doesnt make sense to me because I can demonstrate that in at least one function of the class, the string vector is properly initialized. But when I try to acces it in another class function (the retrieval function), the vector has size = 0.

Heres some pseudo-code to further explain my dilemma:

// lex.h

#include <string>
#include <vector>
using namespace std;

class CLex
{
public: 
 CLex(){ m_vs.resize(0);}
 virtual ~CLex(){}
private:
 vector<string> m_vs;
 //...
public:
 void parse(string s) 
 { // ... 
    m_vs.push_back("numeric string..."); 
 }
 vector<string> get_svec() { return m_vs; }

};

The problem here is that the member vector, m_vs gets properly initialized in the CLex:arse function, but when I try to use CLex::get_svec() to access the data, it comes up empty. Checking the value(s) of m_vs in the function get_svec, m_vs is empty. So what happened to it?

#include "lex.h"

int main()
{
    string s;
    vector<string> vs;
    CLex lx;

    s = "1 2 3\r\n4 5 6\r\n";
    lx.parse(s);
    vs = lx.get_svec() ;
    cout << vs[0] << endl;

}

The class member vector, m_vs, will have values of "1", "2", "3", "4", "5", "6" within the CLex:arse() function, but will be empty (have zero size) in the CLex::get_svec() function.

Can anyone show me what I am doing wrong here? I'm sure it's something fairly simple and stupid as usual.

Thanks.

Mike