errors

I am going to paste my code. It for what is there, I thin kit should run, but I am getting some wierd errors that I cannot fix. Take a look and see if you can see what is wrong.

Code:

#include<iostream>
#include<fstream>
#include<string>
using namespace std;


class employee
{
public:
  string lname;
  string fname;
  string address;
  string city;
  string state;
  string zip;
  char hos;
  int payrate;
  int hours;
  int dependents;
  int gpay;
  int fed;
  int state1;
  int social;
  int net;
  int compute(int payrate, int hours, int dependents, int gpay, int fed, int state1, int social, int net, char hos);
  


};


int main()
{
  string in;
  string out;
  cout<<"Enter the name of the file you want to write to.";
  cin>>out;
  cout<<"Enter the name of the file you want to read from.";
  cin>>in;
  ifstream instream;
  instream.open(in, ios::in);
  ofstream outstream;
  outstream.open(string out);
 employee::compute(int payrate, int hours, int dependents, int gpay, int fed, int state1, int social, int net, char hos);
  



  instream.close();
  ofstream.close();
  return 0;
}

int compute(int payrate, int hours, int dependents, int gpay, int fed, int state1, int social, int net, char hos)
{
  if(hos=='h'||'H')gpay=hours*payrate*100;
  if(hos=='s'||'S')gpay=payrate/26*100;
  fed=(gpay*26)-(2500*dependents)*(.28/.26)*100;
  state1=gpay*.048*100;
  social=gpay*.075*100;
  return (gpay, fed, state1, social);
}

errors would be helpful...

this is what it should be:

Code:

#include<iostream>
#include<fstream>
#include<string>
using namespace std;


class employee
{
private: //what's the point of classes w/o private members
  string lname;
  string fname;
  string address;
  string city;
  string state;
  string zip;
  char hos;
  int payrate;
  int hours;
  int dependents;
  int gpay;
  int fed;
  int state1;
  int social;
  int net;
public:
  [color=red]bool[/bool] compute(char*,char*);  //all the ints are already accessable by this function - it's a class
};


int main()
{
  string in;
  string out;

  employee employeeclass; //need to create an instance of the class, kinda like ifstream/ofstream

  cout<<"Enter the name of the file you want to write to.";
  cin>>out;
  cout<<"Enter the name of the file you want to read from.";
  cin>>in;

  employeeclass::compute(in,out);  [color=blue]//the ofstream & ifstream need to be in the function, not out here

  /* enter output functions here */

  return 0;
}

bool compute(char*in,char*out)
{
  ifstream instream(in);  [color=blue]//four lines of code down to two ;)
  ofstream outstream(out);

  if(hos=='h'||'H')gpay=hours*payrate*100;
  if(hos=='s'||'S')gpay=payrate/26*100;
  fed=(gpay*26)-(2500*dependents)*(.28/.26)*100;
  state1=gpay*.048*100;
  social=gpay*.075*100;

  ifstream.close();
  ofstream.close();

  return true; //not necessary to return anything
}