Question

The following code reads in 4 comma separated values from a .txt file of the format: Kayne,West,1112223333,0.

getline(inputFile, firstName, ',');
getline(inputFile, lastName, ',');
getline(inputFile, phoneNumber, ',');
getline(inputFile, phonetype, '\n');

How could I write a while loop that reads through a .txt file like above (without using eof!) but with an unspecified number of entries?

Answer 1

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

int main() {
    string fileName;
    cout << "Enter file name: ";
    cin >> fileName;
    ifstream in(fileName.c_str());
    if(in.is_open()) {
        string firstName, lastName, phoneNumber, phonetype;
        while (!in.eof()) {
            getline(in, firstName, ',');
            getline(in, lastName, ',');
            getline(in, phoneNumber, ',');
            getline(in, phonetype, '\n');
            cout << "Name: " << firstName << " " << lastName << ", Phone number: " << phoneNumber << ", Type: " << phonetype << endl;
        }
        in.close();
    } else {
        cout << fileName << " does not exists!" << endl;
    }
    return 0;
}