todDb.cpp

#include <fstream>
using std::ifstream;
using std::ofstream;

#include <iostream>
using std::cout;
using std::endl;
using std::cin;

struct tod
{
  int hour;
  int minute;
  int second;
  char descr[32];
};

void coutTod(const tod&);
void coutTod(int n, const tod t[]); // n = number of items in the array

int main()
{
  ifstream fin;
  fin.open("todDb.txt");
  /*if (!fin)
  {
    cout << "Invalid file" << endl;
    return 0;
  }*/
  tod theTime[5];

  // read text file
  for (int i = 0; i < 5; i++)
  {
    fin >> theTime[i].hour >> theTime[i].minute >> theTime[i].second;
    fin.ignore(1, ' ');
    fin.getline(theTime[i].descr, 32);
  }
  fin.close();

  // promt user to change info
  while(1)
  {
    coutTod(5, theTime);
    char yorn;

    // see if user wants to change data
    cout << "Do you want to change any of the data? [Y/N]: ";
    while(1)
    {
      cin >> yorn;
      if (yorn != 'Y' && yorn != 'N') // if input is invalid, prompt for input again
        cout << "Invalid input, enter again: ";
      else break; // break loop if input is valid
    }

    // if yes, change data
    if (yorn == 'Y')
    {
      int i;

      // get which one to change
      cout << "Which TOD would you like to change? [0, 1, 2, 3, or 4]: ";
      while(1)
      {
        cin >> i;
        if (i < 0 || i > 4) // if it's not within range, prompt for input again
          cout << "Invalid input, enter again: ";
        else break;
      }

      // get info to change theTime
      cout << "Enter the hour, minute, second, and description, separated by spaces." << endl;
      cin >> theTime[i].hour >> theTime[i].minute >> theTime[i].second;
      cin.ignore(1, ' ');
      cin.getline(theTime[i].descr, 32);
    }

    // otherwise, break the loop
    else break;
  }

  ofstream fout;
  fout.open("todDb.txt");
  for (int i = 0; i < 5; i++)
    fout << theTime[i].hour << ' ' << theTime[i].minute << ' ' << theTime[i].second << ' '
         << theTime[i].descr << endl;
}

// prints elements of a tod object
void coutTod(const tod& t)
{
  cout << t.descr << " is "
       << t.hour << (t.minute < 10 ? ":0" : ":")
       << t.minute << (t.second < 10 ? ":0" : ":")
       << t.second << endl;
}

// takes tod objects in an array and sends them to be printed
void coutTod(int n, const tod t[]) // n = number of items in the array
{
    for (int i=0;i < n;i++)
      coutTod(t[i]);
}