Tally machine program

[Hypnotik]

Well on to my next program. The program tally's votes on 3 issues. I have a class for the interface (asks questions) and a class for adding the tallies. In main there is a counter of Tally data type. I'm unclear how to actually tally the votes. I have tried sending the counter.add function the GetIssue1 value, however this does not work.

 
#include <iostream>
using namespace std;
class Interface
{
private: 
    int issue1;
    int    issue2;
    int issue3;
public:
    Interface(int=0,int=0,int=0);
    ~Interface(){};
    void SetInterface(int i1,int i2, int i3);
    void Setissue1();
    void Setissue2();
    void Setissue3();
    int Getissue1();
    int Getissue2();
    int Getissue3();
};
Interface::Interface(int issue1,int issue2,int issue3)
{
    SetInterface(issue1,issue2,issue3);
}
void Interface::SetInterface(int i1, int i2, int i3)
{
 
}
void Interface::Setissue1()
{
    int ans=0;
        do
        {
        cout<<endl<<"Question 1: "<<endl;
        cout<<"1) Do you use Microsoft Windows?"<<endl;
        cin>>ans;
            if (ans<0||ans>1)
                cout<<"Please select 0 for NO or 1 for YES."<<endl;
        }
        while (ans<0||ans>1);
 
}
void Interface::Setissue2()
{
    int ans=0;
    do
        {
        cout<<endl<<"Question 2: "<<endl;
        cout<<"2) Are you in favor of open source software?"<<endl;
        cin>>ans;
            if (ans<0||ans>1)
                cout<<"Please select 0 for NO or 1 for YES."<<endl;
        }
        while (ans<0||ans>1);
}
void Interface::Setissue3()
{
    int ans=0;
    do
        {
        cout<<endl<<"Question 3: "<<endl;
        cout<<"3) Do you enjoy programming?"<<endl;
        cin>>ans;
            if (ans<0||ans>1)
                cout<<"Please select 0 for NO or 1 for YES."<<endl;
        }
        while (ans<0||ans>1);
}
int Interface::Getissue1()
{
    return (issue1);
}
int Interface::Getissue2()
{
    return (issue2);
}
int Interface::Getissue3()
{
    return (issue3);
}
class Tally
{
private:
    int issue1_y, issue1_n, issue2_y, issue2_n, issue3_y, issue3_n;
public:
    Tally();
    ~Tally(){};
    int add1(int ans);
    int add2(int ans);
    int add3(int ans);
};
Tally::Tally()
{
    cout<<"Constructor"<<endl;
    issue1_y=0;
    issue1_n=0;
    issue2_y=0;
    issue2_n=0;
    issue3_y=0;
    issue3_n=0;
}
int Tally::add1(int ans)
{
    if (ans==0)
    {
        ++issue1_n;
    }
    else if (ans==1)
    {
        ++issue1_y;
    }
    cout<<"No: "<<issue1_n<<endl<<"Yes: "<<issue1_y<<endl;
    return(0);
}
int Tally::add2(int ans)
{
    if (ans==0)
        ++issue2_n;
    else if  (ans==1)
        ++issue2_y;
    return (0);
 
}
int Tally::add3(int ans)
{
    if (ans==0)
        ++issue3_n;
    else if (ans==1)
        ++issue3_y;
    return (0);
}
void main()
{
    int num=0, ans=0, i=1;
    Tally counter;
    Interface Interface;
    cout<<"Welcome to the tally program."<<endl;
    cout<<"For all issues enter 0 for NO and 1 for YES."<<endl;
    cout<<"How many voters do you have?"<<endl;
    cin>>num;
    do
    {
        cout<<endl<<"Voter: "<<i<<endl;
        Interface.Setissue1();
        Interface.Getissue1();
        counter.add1(Interface.Getissue1());
        Interface.Setissue2();
        Interface.Getissue2();
        counter.add2(Interface.Getissue2());
        Interface.Setissue3();
        Interface.Getissue3();
        counter.add3(Interface.Getissue3());
        --num;
        ++i;
    }
    while (num>0);
}
 
 

Thanks,
J

[Hypnotik]

Problem has been resolved.

J