This works fine for me:

Code:
#include <vector>
#include <string>
#include <iostream>

using namespace std;

int main() {
    string C;
    int A, i;
    vector<int> Nums_Vec;
    vector<string> Words_Vec;

    for (i=0; i<6; i++) {
        A=i;
        Nums_Vec.push_back(A);

        C="one";
        Words_Vec.push_back(C);
    }

    for (i=0; i<6; i++) {
        cout << Nums_Vec[i] << "\t" << Words_Vec[i] << endl;
    }
    return 0;
}
You should not be mixing C and C++ IO.

I believe I already gave you an example for embedding a vector inside a class, one even specific to your current problem.