Tickets Problem

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
using namespace std;

int main()
{
    char ticketPrice1[80], numberOfTicketsSold1[80];
    float totalTicketsSold = 0, totalSaleAmount = 0;
    ifstream file;
    file.open("ticketPrice.txt");
    ifstream file1;
    file1.open("numberofTicketsSold.txt");
    if(!file.is_open() && !file1.is_open()){
        cout << "File does not exist." << endl;

    }
    else {
        /*string ticketPrice;
        while(file.good())
        {
            getline(file,ticketPrice);
            cout << ticketPrice << endl;
        }*/
        while (file.eof()==0 && file1.eof()==0)
        {
            // File
            file.getline(ticketPrice1, sizeof(ticketPrice1));
            file1.getline(numberOfTicketsSold1, sizeof(numberOfTicketsSold1));

            // Test
            // cout << ticketPrice1 << "\t" << numberOfTicketsSold1 << endl;
            // Char to Float
            float ticketPrice = atof(ticketPrice1);
            float numberOfTicketsSold = atof(numberOfTicketsSold1);
            // Total

            // cout << setprecision(2) << fixed << showpoint << ticketPrice * numberOfTicketsSold << endl;
            float sales;
            sales = ticketPrice * numberOfTicketsSold;

            char sales1[80] = (char)sales;
            ofstream file3;
            file3.open("sales1.txt");

            file3 << sales1 << endl;

            ifstream file4;
            file4.open("sales1.txt")

            float totalTicketsSold;
            totalTicketsSold = atof(sales1)



            //cout << setprecision(2) << fixed << showpoint << sales << endl;



            //totalTicketsSold = 0;
            //cout << "Total Number of Tickets Sold: " << totalTicketsSold << endl;
            //cout << "Total Sale Amount: " << totalSaleAmount << endl;
            ;
        }


    }
        return 0;
}