// This program reads in from the keyboard a record of financial information //

Question

// This program reads in from the keyboard a record of financial information

// consisting of a person's name, income, rent, food cost, utilities and

// miscellaneous expenses.  It then determines the net money

// (income minus all expenses)and places that information in a record

// which is then written to an output file.

#include <fstream>

#include <iostream>

#include <iomanip>

using namespace std;

const int NAMESIZE = 15;

struct  budget  //declare a structure to hold name and financial information

{

char name[NAMESIZE + 1];

float income;       // person's monthly income

float rent;         // person's monthly rent

float food;         // person's monthly food bill

float utilities;    // person's monthly utility bill

float miscell;      // person's other bills

float net;          // person's net money after bills are paid

};

int main()

{

   fstream indata;

   ofstream outdata;                                   // output file of

                                                       // student.

   indata.open("income.dat", ios::out | ios::binary);  // open file as binary

                                                       // output.

   outdata.open("student.out");                        // output file that

                                                       // we will write student

                                                       // information to.

   outdata << left << fixed << setprecision(2);        // left indicates left

                                                       // justified for fields

   budget person;   //defines person to be a record

   cout << "Enter the following information" << endl;

   cout << "Person's name: ";

   cin.getline(person.name, NAMESIZE);

   cout << "Income :";

   cin >> person.income;

   // FILL IN CODE TO READ IN THE REST OF THE FIELDS:

   // rent, food, utilities AND miscell TO THE person RECORD

   // find the net field

   person.net = // FILL IN CODE TO DETERMINE NET INCOME (income - expenses)

   // write this record to the file

   // Fill IN CODE TO WRITE THE RECORD TO THE FILE indata (one instruction)

   indata.close();

   // FILL IN THE CODE TO REOPEN THE indata FILE, NOW AS AN INPUT FILE.

   // FILL IN THE CODE TO READ THE RECORD FROM indata AND PLACE IT IN THE

   // person RECORD (one instruction)

   // write information to output file

   outdata << setw(20) << "Name" << setw(10) << "Income" << setw(10) << "Rent"

       << setw(10) << "Food" << setw(15) << "Utilities" << setw(15)

           << "Miscellaneous" << setw(10) << "Net Money" << endl << endl;

   // FILL IN CODE TO WRITE INDIVIDUAL FIELD INFORMATION OF THE RECORD TO

   // THE outdata FILE.(several instructions)

    return 0;

}

Explanation / Answer

#include <fstream>
#include <iostream>
#include <iomanip>
using namespace std;
const int NAMESIZE = 15;
struct budget //declare a structure to hold name and financial information
{
char name[NAMESIZE + 1];
float income; // person's monthly income
float rent; // person's monthly rent
float food; // person's monthly food bill
float utilities; // person's monthly utility bill
float miscell; // person's other bills
float net; // person's net money after bills are paid
};
int main()
{
fstream indata;
ofstream outdata; // output file of
// student.
indata.open("income.dat", ios::out | ios::binary); // open file as binary
// output.
outdata.open("student.out"); // output file that
// we will write student
// information to.
outdata << left << fixed << setprecision(2); // left indicates left
// justified for fields
budget person; //defines person to be a record
cout << "Enter the following information" << endl;
cout << "Person's name: ";
cin.getline(person.name, NAMESIZE);
cout << "Income :";
cin >> person.income;
// FILL IN CODE TO READ IN THE REST OF THE FIELDS:
// rent, food, utilities AND miscell TO THE person RECORD
cout << "rent :";
cin >> person.rent;
cout << "food :";
cin >> person.food;
cout << "utilities :";
cin >> person.utilities;
cout << "miscell :";
cin >> person.miscell;
// find the net field
// FILL IN CODE TO DETERMINE NET INCOME (income - expenses)
person.net = person.income - (person.rent + person.food + person.utilities + person.miscell);
// write this record to the file
// Fill IN CODE TO WRITE THE RECORD TO THE FILE indata (one instruction)
indata.write((char*)&person,sizeof(person));
indata.close();
// FILL IN THE CODE TO REOPEN THE indata FILE, NOW AS AN INPUT FILE.
indata.open("income.dat", ios::in | ios::binary);
// FILL IN THE CODE TO READ THE RECORD FROM indata AND PLACE IT IN THE
// person RECORD (one instruction)
indata.read((char*)&person,sizeof(person));
// write information to output file
outdata << setw(20) << "Name" << setw(10) << "Income" << setw(10) << "Rent"
<< setw(10) << "Food" << setw(15) << "Utilities" << setw(15)
<< "Miscellaneous" << setw(10) << "Net Money" << endl << endl;
// FILL IN CODE TO WRITE INDIVIDUAL FIELD INFORMATION OF THE RECORD TO
// THE outdata FILE.(several instructions)
outdata << setw(20) << person.name << setw(10) << person.income << setw(10) << person.rent
<< setw(10) << person.food << setw(15) << person.utilities << setw(15)
<< person.miscell << setw(10) << person.net << endl << endl;
return 0;
}

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