Working with File IO in C++

ifstream.cpp

//File I/O in 5 steps
#include <iostream>

#include <string>

#include <fstream> //Step 1)Include the header file fstream in the program.

#include <iomanip>

using namespace std;

int main() {

  string firstName, lastName;
  double curSal, payInc, newSal;

  //Step 2)Declare file stream variables
  ifstream inData;
  ofstream outData;

  //getLine needs a string as its second param. User inputs file name
  string inFlString;
  cout << "Please enter file name, including file extension: ";
  getline(cin, inFlString); //user puts in file with extension. "Ch3_Ex5Data.txt"

  //Step 3)Associate the file stream with I/O sources. Program writes to this file
  inData.open(inFlString);
  outData.open("Ch3_Ex5Output.dat");

  //Step 4)Use the file stream variable with >>,<<, or other I/O functions. Code for data manipulation
  while (inData >> lastName >> firstName >> curSal >> payInc) {
    newSal = (curSal * payInc / 100) + curSal; // pay increase was a %percentage
    //"fixed notation != e+10" "showpoint" decimall will always display "setpercicion" amount of dec
    cout << fixed << showpoint << setprecision(2);
    cout << firstName << " " << lastName << " " << newSal << endl;
    outData << fixed << showpoint << setprecision(2);
    outData << firstName << " " << lastName << " " << newSal << endl;
  }

  //Step 5)Disassociate stream variables
  inData.close();
  outData.close();

  return 0;
}