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