// Project FileIO
// File file_io.cpp

// include <fstream> when performing file io.

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

int main()
{
    string name;
    string gender;
    int salary, count = 0, sum = 0;
    double ave;

    // Declare and open the input file object 
    // fin that reads from the given file.
    ifstream fin("c:\\salaries.txt");

    // Declare and open the output file object 
    // fin that writes from the given file.
    ofstream fout("c:\\out.txt");

    if (fin.fail())
    {
        cout << "Could not open input file." << endl;
        return EXIT_FAILURE;
    }

    // Don't need to check if output file
    // creation was a success.

    while (fin >> name >> gender >> salary)
    {
        if (gender == "F")
        {
            sum += salary;
            count++;
        }
    }

    ave = static_cast<double>(sum) / count;
    fout << "The average salary of women is $" <<
        ave << ".";
    return EXIT_SUCCESS;
}