Need Help w/ I/O and Predefined Character Functions

Okay, so I am trying to read an input of a file, and output and display it's stats. The stats that I am looking for are.. : the total number of characeters, the total number of letters, and total number of non-whitespace characters (which is just the total number of letters + the total number of whitespace characters).

Here is my code so far. Currently, the total number of letters is outputting correctly, but when i add the whitespace function to the code, the whitespace function outputs zero, but when I take the letters function out of the code, it outputs the correct number? Any reason why this is happening?

Code:

 #include <iostream>
#include <fstream>
#include <cstdlib>
#include <iomanip>
using namespace std;


void whiteSpace (ifstream& in_stream, ofstream& out_stream) // Count WhiteSpaces
{
     int wS = 0;
     char w;
     
     in_stream.get(w);
     do
     {       
          if (isspace(w))
          wS++;
          in_stream.get(w);
    
     } while (w != '.');
   	cout << "The total count of non-whitespace characters is : " << wS << "." << endl;
    out_stream << "The total count of non-whitespace characters is : " << wS << "." << endl;
     
}

void letters (ifstream& in_stream, ofstream& out_stream) // Count Letters
{
     int aC = 0;
     char c;

     in_stream.get(c);
     while (! in_stream.eof())
     {
           if (isalpha(c))
           aC++;
           in_stream.get(c);
     }
     cout << "The total count of letters is : " << aC << "." << endl;
     out_stream << "The total count of letters is : " << aC << "." << endl;
}

int main () // Main Function
{ 
    int out_stream;  
	ifstream fin;
	ofstream fout;

	fin.open("ex16in.txt");
	if (fin.fail())
	{
		cout << "Failed to open input file!\n";
		system("PAUSE");
		exit(1);
	}
    fout.open("ex16out.txt");
    if (fout.fail())
	{
		cout << "Failed to open input file!\n";
		system("PAUSE");
		exit(1);
	}
	
	letters(fin, fout);
	whiteSpace(fin, fout);
	
    fin.close(); // Close Input File
	fout.close(); // Close Output File
	
	system("PAUSE");
	return 0;
}

Nevermind, I finally got everything working correctly. I merged the void functions and did some other changes, now everything works fine.