Debugging Parse errors

I am trying to compile the following code, and I keep getting parse errors. Can someone please tell me what these errors are, and what may be wrong with my code that I am getting them.

Code:

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

const int size = 100;

typedef struct Region
   {
   int code;
   char name_township[60];
   char name_state[20];
   char name_county[20];
   };

int read_regions(Region records[], char filename);

int main(int argc, char *argv[])
   {                               
   if(argc !=3)
      {
      cout << "This program needs 2 command line arguments" << endl;
      exit(0);
      }

   Region township_data[size];

   if(argv[3] == "township.dat")
      read_regions(Region township_data[size], argv[3]);
   else
      read_regions(Region township_data[size], argv[2]);
   }

int read_regions(Region records[], char filename)
   {
   ifstream infile;   

   infile.open("filename", ios::in | ios::binary);
   assert(infile);
   infile.read(records, sizeof(records));

   infile.close();
   return 1;
   }

Thanks for reading.

In read_regions file name should be a char* or char[] not a char... and you should actually use it =)

And what are the specific errors?

Ok, I found the error, it's in my function, and I've modified it a little, and am still getting errors, but I know where the errors are: the errors are in the infile.read() statement. Something about not matching arguments. please help me. As usual, thanks for reading.

Code:

int read_regions(Region records[], char *filename)
   {
   ifstream infile;

   infile.open (filename, ios::in | ios::binary);

   if(!infile)
      return fail;
   else            
         {
         infile.read(records, sizeof(records));
         return 1;
         }
   }

:

And here are my errors messages:
assign1.cc: In function `int read_regions(Region*, char*)':
assign1.cc:40: no matching function for call to `std::basic_ifstream<char,
std::char_traits<char> >::read(Region*&, unsigned int)'
/opt/gcc-3.2/include/c++/3.2.1/bits/istream.tcc:778: candidates are:
std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
_Traits>::read(_CharT*, int) [with _CharT = char, _Traits =
std::char_traits<char>]

>>infile.read(records, sizeof(records));

The prototype for read() is:
>>istream &read( char *buffer, streamsize num );
Do you think that records is a char* ?
Also, sizeof(records) won't work, as records is a pointer, therefore its size will be the size of the pointer, not what it points to.