/*
* Main Method
*/
static void Main(string[] args)
{
string html_js_arr;
User_args user_input = new User_args();
// Begin by gathering the user input
Get_user_input(ref user_input);
html_js_arr = Compute_interest_rates(ref user_input);
// Write the file output
Write_file(ref html_js_arr);
System.Console.ReadLine();
}
/*********************************************************************
** Function: Computes all the interest rates
** Description: Takes in the user struct and returns the interest rate string to write to file
** Parameters: Referenced User_args struct
** Pre-Conditions: All struct values should be non null
** Post-Conditions: string that is Javascript ready
*********************************************************************/
private static string Compute_interest_rates(ref User_args user_input)
{
string js_arr_str = "[['Period',"; // setting up the string
double[] interest_rates = new double[user_input.num_of_interest_intervals + 1]; // This will create a fixed interest rate constant from user input
double interest_rate = Math.Round(((user_input.max_interest_rate - user_input.min_interest_rate) / user_input.num_of_interest_intervals), 2);
for (int x = 0; x < interest_rates.Length; x++)
{
interest_rates[x] = interest_rate * x + user_input.min_interest_rate;
js_arr_str += "'" + interest_rates[x] + "%'";
if (x + 1 != interest_rates.Length)
{
js_arr_str += ",";
}
}
js_arr_str += "],"; // If this is the last loop, don't print a comma. Javascript is cool and allows this, but I'm picky.
// Loop through periods gathered from user input. We want to do this first, because the Google API requires our Y axis to be rows
for (int y = 0; y < user_input.num_of_periods; y++)
{
js_arr_str += "['" + (y + 1) + "',";
// Go through the previously stored interest rates
for (int x = 0; x < interest_rates.Length; x++)
{
// compute the compund interest
double amount = Math.Round((user_input.starting_capital * System.Math.Pow(1 + (interest_rates[x] / 100), y + 1)), 2);
js_arr_str += amount; // append to string. No need to put in quotes, it is a number, and javascript does not require elements to be cast a strings
//System.Console.Write("$" + amount + ", ");
if (x + 1 != interest_rates.Length)
{
js_arr_str += ",";
}
}
js_arr_str += "]"; // This will close the javascript array
if (y + 1 != user_input.num_of_periods) // If this is the last loop, don't print a comma. Javascript is cool and allows this, but I'm picky.
{
js_arr_str += ",";
}
}
return(js_arr_str + "]"); //return string with closing bracket
}
/*********************************************************************
** Function: Obtain user input
** Description: will obtain user input and check if it is valid
** Parameters: message Referenced User_args struct
** Pre-Conditions: Referenced struct should be defined!
** Post-Conditions: returns nothing
*********************************************************************/
private static void Get_user_input(ref User_args user_input)
{
bool error; // purposly left uninitalized because the do while will set it
int dummy_int = 0; // dummy vars are because c# can't pass null ints or doubles
float dummy_float = 0; // --^
// Get starting capital
do
{
error = check_for_validity("Enter the starting capital [1-" + MAX_STARTING_CAPITAL + "]: ", 'f', ref user_input.starting_capital, ref dummy_int, MAX_STARTING_CAPITAL, 0);
} while (error); // do while there are errors
do // This do while is for when the user inputs a high interest rate lower than the low
{
// Get low interest rate
do
{
error = check_for_validity("Enter the low interest rate [0-" + MAX_INTEREST_RATE + "]: ", 'f', ref user_input.min_interest_rate, ref dummy_int, MAX_INTEREST_RATE, 0);
} while (error);
// Get high interest rate
do
{
error = check_for_validity("Enter the high interest rate [0-" + MAX_INTEREST_RATE + "]: ", 'f', ref user_input.max_interest_rate, ref dummy_int, MAX_INTEREST_RATE, 0);
} while (error);
if (user_input.max_interest_rate < user_input.min_interest_rate)
{
System.Console.WriteLine("Your max interest rate is less than your min! Try again...");
}
} while (user_input.max_interest_rate < user_input.min_interest_rate);
// Get interest intervals
do
{
error = check_for_validity("Enter the number of interest intervals [0-" + MAX_INTEREST_INTERVALS + "]: ", 'i', ref dummy_float, ref user_input.num_of_interest_intervals, 0, MAX_INTEREST_INTERVALS);
} while (error);
// Get periods
do
{
error = check_for_validity("Enter the number of periods [0-" + MAX_COMPOUND_PERIODS + "]: ", 'i', ref dummy_float, ref user_input.num_of_periods, 0, MAX_COMPOUND_PERIODS);
} while (error);
}
