// Program IODemo demonstrates how to use files

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

int main()
{
    cout  << fixed  << showpoint;

    float val1, val2, val3, val4;	// declares 4 variables
    ifstream inData;			// declares input stream
    ofstream outData;			// declares output stream

    cout << "Program iodemo.cpp reads four floating point values " << endl;
    cout << "from the input file inputfile.txt and writes those values " << endl;
    cout << "to the output file outputfile.txt in the reversed order." << endl;

    inData.open("inputfile.txt");
    // binds program variable inData to file "inputfile.dat"

    outData.open("outputfile.txt");
    // binds program variable outData to file "outputfile.dat"

    //CS110 students will add code here to check the input file status.





    


    if (!outData)
        {
	cout << "** Problem: cannot open output file outputfile.dat, ending program."
	     << endl;
        return 1;
        }
    else
	cout << "Program successfully opened output file outputfile.dat" << endl;

    inData  >> val1 >> val2 >> val3 >> val4;	// inputs 4 values
    outData  << val4  << endl;
    outData  << val3  << endl;
    outData  << val2  << endl;
    outData  << val1  << endl;	// outputs 4 values
    return 0;
}