Jackbens C++ Town Growth Calc

// This program is meant to calculate and output population growth
// information for two different towns based on user input.
// It takes the population and growth rate of each town
// and outputs how many years until the population of
// the smaller town will be greater than the other
// as well as the population of both towns at that time.
//**************************************************************

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

int main()
{

    string townA, townB;
    int popA, popB, lead, year=0;
    double rateA=0.00, rateB=0.00;

    cout << "Please enter the name of the first town"
         << " and press enter: " << endl;

    getline (cin, townA);

    cout << "\nEnter the name of the second town: " << endl;

    getline (cin, townB);

    cout << "\nEnter the population & growth rate for "
         << townA << " separated by space." << endl;

    cin >> popA >> rateA;

    cout << "\nEnter the population & growth rate for "
         << townB << " separated by space." << endl;

    cin >> popB >> rateB;

    if (popA == popB && rateA == rateB)
    {
        cout << "\nBoth populations match & will grow equally."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << "Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

        system("Pause");

        return 0;
    }

    if (popA == popB && rateA > rateB)
    {
        cout << "\nBoth populations match, but will grow differently."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << " Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

      system("Pause");

      return 0;
    }

    else if (popA == popB && rateA < rateB)
            {
        cout << "\nBoth populations match, but will grow differently."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << " Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

      system("Pause");

      return 0;
    }

    if (popB > popA && rateA == rateB)
    {
        cout << "\nAny population disparity will grow indefinitely."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << " Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

      system("Pause");

      return 0;
    }

    if (popA > popB && rateA > rateB)
    {
        cout << "\nAny population disparity will grow indefinitely."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << " Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

      system("Pause");

      return 0;
    }

    if (popB > popA && rateB > rateA)
    {
        cout << "\nAny population disparity will grow indefinitely."
             << endl;
        cout << townA << " Population: " << popA << " "
             << "Growth Rate: " << rateA << "%\n"
             << townB << " Population: " << popB << " "
             << "Growth Rate: " << rateB << "%\n" << endl;

      system("Pause");

      return 0;
    }

    if (popA > popB)
    {
        lead = 1;
    }

    do
    {
        popA += (popA * (rateA / 100));
        popB += (popB * (rateB / 100));
        year++;
    }
    while (popA < popB);

    do
    {
        popA += (popA * (rateA / 100));
        popB += (popB * (rateB / 100));
        year++;
    }
    while (popA < popB);

    if (lead == 1)
        {
            cout << "\nThe population of " << townB <<
            " will eclipse " << townA << " in: " << endl;
            cout << year << " year(s).\n";

            cout << "\nAt that time " << townA << "'s population "
                << "will be:\n" << popA << " and "
                << townB << "'s population: " << popB << endl;
        }
    else
    {
        cout << "\nThe population of " << townA <<
            " will eclipse " << townB << " in: " << endl;
        cout << year << " year(s).\n";

        cout << "\nAt that time " << townA << "'s population "
             << "will be:\n" << popA << " and "
             << townB << "'s population: " << popB << endl;
    }

    cin.ignore(2);

    system("Pause");

    return 0;

}