New to C++, help with functions and constructors in classes

[nicholas.buckley.14]

I have to write a program that accepts data for a class and then ouputs it in the main.
so far i have this.

#include<iostream>
#include<string>
#include<fstream>
using namespace std;
ifstream infile;
class animal
{
 string species;
 string family;
 string phylum;
 string desc;
 static int count;
public:
 bool readIN(const string fname);
 void printInfo() const;
 void setAnimal (string s, string f, string p,
  string d);
 static int getCount();
 animal(string s, string f, string p, string d);
 animal(ifstream& file, const string fname);
};
int animal::count=4;
bool readIN(const string& fname)
{
 infile.open("cat.txt");
 return infile;
}
void animal::setAnimal (string species, string family, string phylum, string desc)
{
 while(!infile.eof())
 {
  infile>>species;
  infile>>family;
  infile>>phylum;
  infile>>desc;
 }
}
void animal::printInfo() const
{
 animal setAnimal(species, family, phylum, desc); 
 cout << species;
 cout << family;
 cout << phylum;
 cout << desc;
}
static int getCount()
{
 static int count;
 cout << count;
 return count;
}
animal::animal(string species, string family, string phylum, string desc)
{
 species="";
 family="";
 phylum="";
 desc="";
}
animal::animal(ifstream& file, const string fname)
{
 readIN(fname);
}
int main()
{
 int y;
 animal readIN(fname);
 animal setAnimal(species, family, phylum, desc);
 animal printInfo();
 animal getcount();
 cin >> y;
 return 0;
}

I am getting errors in my int main stating that the variables in the first two functions are undefined.
Thanks for help if any

[rstralberg]

You must have an instance of the animal class in order to use it.

int main()
{
   animal a;
   a.ReadIN(fname);
   a.setAnimal(....)
   etc
   etc
}