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What's wrong with my use of Stringstream here?

leo255 (139)
The program basically works as I want it to work - It grabs data from an input file, and then checks if the data is valid - The invalid data gets written to one text file, while the valid data then calculates a few things, and then writes it to another text file.

My problem is with the use of Stringstream - For my while loop, when I use something like, "while (!inFile.eof())", it processes the last line twice, so I thought of using stringstream, to process it line by line...I wrote it like so: 

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while (getline(inFile, line)){

istringstream ss(line);

while(ss >> numAdults >> numChildren >> mealType >> dayType >> depositAmount){


There is a combination of integers, chars and floats, so I thought that would be the correct way to utilize it.

The output in the billing_statement text file is this:

 Adults Children  Meal  Weekend  Deposit    Tax  Surcharge  Discount   Meal Cost
     27        3     D        Y    57.50  133.75     52.03     27.83      767.41
      4        0     S        N    25.00   15.66     52.03      1.31       85.87
    250       43     D        N   500.00 1280.82     52.03    249.05     6866.77
      5        0     D        Y   275.00   23.22      9.04      3.46      134.77

And the output in the error_file text file is this:


 Adults Children  Meal  Weekend  Deposit 
     10        0     R        Y       10
     14       -1     S        N       30
     20        3     D        Y      -10


Certain data is being combined, instead of being processed line by line. Would appreciate some insight.

Thanks!

here is my program INPUT:

10 0 S Y 100.00
27 3 D Y 57.50
125 17 D N 0.00
4 0 S N 25.00
0 25 S Y 23.75
250 43 D N 500.00
0 0 D N 0.0
10 0 R Y 10.00
17 3 D R 15.00
5 0 D Y 275.00
-3 10 D Y 20.00
14 -1 S N 30.00
20 3 D Y -10.00


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#include <iostream>
#include <fstream>
#include <iomanip>
#include <sstream>
#include <string>


using namespace std;

void getData(int &, int &, char &, char &, float &);
void checkValid(int &, int &, char &, char &, float &, bool &);
void calcData(int, int, char, char, float, float &, float &, float &, float &);
void sendData(int, int, char, char, float, float &, float &, float &, float &);

ifstream inFile;
ofstream outFile("Billing_Statement.txt");
ofstream error_Report("Error_Report.txt");

//Declare the tax rate and weekend surcharge as constants.

const float taxRate = 0.18;
const float weekendSurcharge = .07;

int main()
{

    bool valid = true;
    float mealCost;
    float totalTax;
    float totalSurcharge;
    float discountAmount;
    int numAdults;
    int numChildren;
    char mealType;
    char dayType;
    float depositAmount;
    string line;

    cout << "\nThis program will calculate data for a catering company " << endl;

    outFile << " Adults " << "Children  " << "Meal " << " Weekend " << setw(9) << "Deposit " << setw(6) << "Tax" << setw(11) << "Surcharge" << setw(10) << "Discount" << setw(12) << "Meal Cost" << endl;
    error_Report << " Adults " << "Children  " << "Meal " << " Weekend " << setw(9) << "Deposit " << endl;

    inFile.open("file.txt");

    if (!inFile) {
	cout << "\nError: File could not be opened. ";
    //exit(1);
    }

    while (getline(inFile, line)){

    istringstream ss(line);

    while(ss >> numAdults >> numChildren >> mealType >> dayType >> depositAmount){

	getData(numAdults, numChildren, mealType, dayType, depositAmount);
	checkValid(numAdults, numChildren, mealType, dayType, depositAmount, valid);

	if (valid == true)
	{
	    calcData(numAdults, numChildren, mealType, dayType, depositAmount, totalTax, totalSurcharge, discountAmount, mealCost);
	    sendData(numAdults, numChildren, mealType, dayType, depositAmount, mealCost, totalTax, totalSurcharge, discountAmount);
	}}
	}

    cout << "\nA copy of this has created for your convenience in the file, \"Billing_Statement.txt \"" << endl;

    inFile.close();
    outFile.close();
    error_Report.close();

    return 0;

}

void getData(int & numAdults, int & numChildren, char & mealType, char & dayType, float & depositAmount)
{
    inFile >> numAdults >> numChildren >> mealType >> dayType >> depositAmount;
}

void checkValid(int & numAdults, int & numChildren, char & mealType, char & dayType, float & depositAmount, bool & valid)
{

    if (numAdults < 0 || numChildren < 0)
	valid = false;
    else if (!(mealType == 'D' || mealType == 'S'))
	valid = false;
    else if (!(dayType == 'Y' || dayType == 'N'))
	valid = false;
    else if (depositAmount < 0)
	valid = false;

    else
	valid = true;

    if (valid == false) {

	error_Report << setw(7) << numAdults << setw(9) << numChildren << setw(6) << mealType << setw(9) << dayType << setw(9) << right << depositAmount << setw(8) << endl;
    }
}

void calcData(int numAdults, int numChildren, char mealType, char dayType, float depositAmount, float & totalTax, float & totalSurcharge, float & discountAmount, float & mealCost)
{

    if (mealType == 'S') {

	mealCost = ((numAdults * 21.75) + (numChildren * (21.75 * .60)));
	totalTax = mealCost * taxRate;
    mealCost += taxRate;

	if (dayType == 'Y') {
	    totalSurcharge = mealCost * weekendSurcharge;
        mealCost += totalSurcharge;
	}}

    else {

	mealCost = ((numAdults * 25.80) + (numChildren * (25.80 * .60)));
	totalTax = mealCost * taxRate;
    mealCost += taxRate;

	if (dayType == 'Y') {
	    totalSurcharge = mealCost * weekendSurcharge;
	    mealCost += totalSurcharge;
        }
    }

    if (mealCost < 100) {

	discountAmount = .015 * mealCost;
	mealCost -= discountAmount;
    }

    else if (mealCost >= 100 && mealCost < 400) {

	discountAmount = .025 * mealCost;
	mealCost -= discountAmount;
    }

    else if (mealCost >= 400) {

	discountAmount = .035 * mealCost;
	mealCost -= discountAmount;
    }
}

void sendData(int numAdults, int numChildren, char mealType, char dayType, float depositAmount, float &mealCost, float &totalTax, float &totalSurcharge, float &discountAmount)
{
    outFile << fixed << showpoint << setprecision(2);
    outFile << setw(7) << numAdults << setw(9) << numChildren << setw(6) << mealType << setw(9) << dayType << setw(9) << right << depositAmount << setw(8) << totalTax << setw(10) << totalSurcharge << setw(10) << right << discountAmount << setw(12) << right << mealCost << endl;
}
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