Stock Analyzer

/*
Name: Nickelis Jarvis
Date: 9.23.14
Program Name: Stockbroker
Description: Analyze and calculate gain or loss of stock over time.
*/

#include <iostream>
#include <iomanip>
#include <string>
#include <cstdlib>
#include <ctime>

//globally define the value of percentage, this can also be done with a const double, but doing so limits it's scope.
#define PERCENT 100.0

using namespace std;

int main() {
    //declare and initialize variables, i prefer to order them by sizeof(*type).
    bool coinFlip;
    int numberShares;
    double purchasePrice, sharesCost, newCost, percentGain;
    const double commissionRate = 0.021;
    string stockName, stockSymbol;

    //Get name of company you're purchasing shares in.
    cout << "Enter name of company: ";
    getline(cin, stockName);

    //Get stock symbol, this is usually 3-5 characters, all capital letters.
    cout << "Enter stock symbol: ";
    getline(cin, stockSymbol);

    //Get number of shares you purchased.
    cout << "Enter number of shares purchased: ";
    cin >> numberShares;

    //Get the price per each share.
    cout << "Enter the price per share: ";
    cin >> purchasePrice;

    //Calculate the total cost of shares purchased.
    sharesCost = purchasePrice * numberShares;

    //Output cost of shares, commission rate, amount of comission charged, and total cost of purchase.
    cout << fixed << setprecision(2) << "Cost of shares: $" << sharesCost << endl;
    cout << setprecision(1) << "Comission rate: " << (commissionRate * PERCENT) << "\%" << endl;
    cout << setprecision(2) << "Commission charged: $" << (commissionRate * sharesCost) << endl;
    cout << "Total cost of purchase: $" << (commissionRate + sharesCost) << "\n" << endl;

    //Seed the random number generator by time since epoch.
    srand(time(NULL));

    //Initialize percentGain with a random number from 1-100, divided by percent global constant.
    percentGain = (rand() % 100) / PERCENT;

    //Initialize the boolean value coinFlip randomly (odd number = TRUE, even number = FALSE; 50/50 chance).
    coinFlip = (rand() % 2);

    //I re-worked the if; else statement to a ternary statement.
    coinFlip ? newCost = sharesCost + (sharesCost * percentGain) : newCost = sharesCost - (sharesCost * percentGain);


    //Output new value, share price, total share value, amount of profit or loss, and return rate.
    cout << "The new value of the stock" << endl;
    cout << "New share price: $" << newCost / numberShares << endl;
    cout << "New value of shares: $" << newCost << endl;
    cout << "Profit or loss: $" << newCost - sharesCost << endl;
    cout << "Rate of return: " << (newCost - sharesCost) / sharesCost << "\%" << endl;

    //Pause to view output.
    system("pause");

    return(0);
}