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

const int RESRATE = 80;
const int STADRATE = 50;
const int STANDRATE = 35;
const float PRODPERCENT = 0.8;

int main()
{	char name[80], filename[40];
	int totalgross = 0;
	int res, stad, stand, gross;
	ifstream fin;
	ofstream fout;

	cout << "Enter file name to be processed: ";
	cin >> filename;
	fin.open(filename);
	if (fin.fail())
	{	cout << "**FILE NOT FOUND!\n";
		return(0);
	}
	fout.open("f:\\report.txt");
	{	cout << "**COULD NOT CREATE REPORT FILE!\n";
		return(0);
	}
	fin.getline(name, 80);
	fin >> res >> stad >> stand;
	while (res >= 0)
	{	gross = res * RESRATE + stad * STADRATE + stand * STANDRATE;
		totalgross = totalgross + gross;
		fin >> res >> stad >> stand;

	}
	fout << setprecision(2) << fixed;
	fout << "Concert name: " << name << endl;
	fout << "    Total Gross: $" << float(totalgross) << endl;
	fout << "    Production costs: $" << totalgross * PRODPERCENT << endl;
	cout << "program done.\n";
	return 0;
}