string help

#include <iostream>
#include <string>
using namespace std;
void readoriginaldate (string &);
void breakoriginaldate(string, string&, string&, string&);
int main()
{
    string originaldate, month, day, year;

    readoriginaldate(originaldate);
    breakoriginaldate(originaldate, month, day, year);


    return 0;
}


void readoriginaldate (string &origdate)
{
    int s;

    cout<<"Please enter the date in MM/DD/YY format, seperated by slashes."<<endl;
    cout<<"For example, 6/11/08"<<endl;
    getline(cin, origdate);

    s=origdate.size();
    while (s>8||s<6){
        cout<<"The date you have entered is invalid."<<endl;
        cout<<"Please enter the date in MM/DD/YY format, seperated by slashes."<<endl;
        cout<<"For example, 6/11/08"<<endl;
        getline(cin, origdate);
        s=origdate.size();
    }

    cout<<origdate<<" is the original date"<<endl;
    return;
}


void breakoriginaldate (string origdate, string &month, string &day, string &year)
{
    int slash;

    slash=origdate.find("/",0);
    month=origdate.substr(0,slash);
    cout<<month<<" is the month"<<endl;

    origdate.erase(0, slash);
    slash=origdate.find("/",0);
    day=origdate.substr(0,slash);
    cout<<day<<" is the day"<<endl;

    origdate.erase(0, slash);
    year=origdate;
    cout<<year<<" is the year"<<endl;

    return;
}