// Method to handle delete operation
public static void DeletePolynomial(Polynomials p)
{
if (p.Count() == 0)
{
System.Console.WriteLine("Cannot perform operation with zero items in the list");
return;
}
// Variable to store user input
// Note that it is equal to list size + 1, for because we need to seed the loop for index validation
int index = p.Count() + 1;
// Prompt the user to input the index
System.Console.WriteLine("Please, input the index of polynomial you wish to delete:");
// Start 'index in bounds' validation loop
while (index > p.Count() || index < 1)
{
index = GetUserInputInt(System.Console.ReadLine());
if (index <= p.Count() && index > 0)
{
break;
}
System.Console.WriteLine("Index out of bounds, please try again:");
}
// Delete the polynomial from the list
p.Delete(index);
}
public static void DeletePolynomial(Polynomials P)
{
string aInput = null;
int aOutput = 0;
if (P.Polycount == 0)
{
Console.WriteLine("No polynomials!");
}
else
{
do
{
Console.Write("Please input the index of the polynomial which you would like to delete. >> ");
aInput = Console.ReadLine();
while (!Int32.TryParse(aInput, out aOutput))
{
Console.Write("Invalid input. Please enter an integer greater than 0. >> ");
aInput = Console.ReadLine();
}
} while (aOutput <= 0 || aOutput > P.Polycount);
P.Delete(aOutput);
}
}
static void Main(string[] args)
{
try
{
//Creates a new list, S, of Polynomials
Polynomials S = new Polynomials();
//Data members
double coef;
int count = 0;
//Data members for deciding what the program will do the make sure it's a number
int pick;
int exp;
//Will continue the program until the user inputs "6"
do
{
//Detailing all the options the user has
Console.WriteLine("Welcome to the Polynomial program, please read all the options before entering an input");
Console.WriteLine("Here is the list of polynomials");
S.Print(); // prints the list so the user knows what is already in the list
Console.WriteLine("Press 1 if you would like to insert a polynomial into the list printed above");
Console.WriteLine("Press 2 if you would like to add two polynomials together and insert them into the list");
Console.WriteLine("Press 3 if you would like to multiply two polynomials together and insert it into the list");
Console.WriteLine("Press 4 if you would like to delete any polynomials from the list above");
Console.WriteLine("Press 5 if you would like to evaluate a polynomial from the list, provided that you enter x");
Console.WriteLine("Press 6 if you would like to close this console");
pick = Convert.ToInt32(Console.ReadLine());
//If the user tries to enter a letter instead of a number, it gets an error
if (pick < 1 || pick > 6)
{
Console.WriteLine("Sorry, you must pick an option between 1 and 6");
Console.WriteLine("");
}
//If the user picks the 1st option, it does this
if (pick == 1)
{
//creates a new list to keep track of what the user has entered
Polynomial b = new Polynomial();
int hMany;
int i = 0;
//asks the user how many terms they want to enter
Console.WriteLine("How many terms do you want to add to?");
hMany = Convert.ToInt32(Console.ReadLine());
//Asks the user what they want the coefficient and exponent to be until i reaches hMany
while (i < hMany)
{
Console.WriteLine("Please enter the coefficient");
coef = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("Please enther the exponent");
exp = Convert.ToInt32(Console.ReadLine());
//takes the coefficient and exponents, adds them to the term
Term t = new Term(coef, exp);
b.AddTerm(t);
i++;
count++;
}
//Inserts the newly added polynomials into S
S.Insert(b);
}
//Tells the program what to do if the user enters 2
else if (pick == 2)
{
//Checks to see if there are any polynomials to add together in the first place
if (count < 2)
{
Console.WriteLine("There are no polynomials in the list");
Console.WriteLine("");
}
//Asks the user which polynomails he wants to use, then it adds them together and inserts it in to the list
else
{
Console.WriteLine("Here is the list of Polynomials");
S.Print();
int Ret1, Ret2;
Console.WriteLine("Please enter the index of the first polynomial you would like to use ");
Ret1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the index of the second polynomial you would like to use");
Ret2 = Convert.ToInt32(Console.ReadLine());
Polynomial answer = S.Retrieve(Ret1) + S.Retrieve(Ret2);
Console.WriteLine("Your new polynomial is:");
answer.Print();
Console.WriteLine("");
S.Insert(answer);
}
}
//Tells the program what to do if the user wants to multiply
else if (pick == 3)
{
//Checks to see if there are polynomials to multiply together
if (count < 2)
{
Console.WriteLine("There are no polynomials in the list");
Console.WriteLine("");
}
//Asks the user for which polynomials it wants to multiply together and then inserts it
else
{
Console.WriteLine("Here is the list of Polynomials");
S.Print();
int Mul1, Mul2;
Console.WriteLine("Please enter the index of the first polynomial you would like to use ");
Mul1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the index of the second polynomial you would like to use");
Mul2 = Convert.ToInt32(Console.ReadLine());
//inserts the newly multiplied together polynomial
Polynomial result = S.Retrieve(Mul1) * S.Retrieve(Mul2);
Console.WriteLine("Your new polynomial is:");
result.Print();
Console.WriteLine("");
S.Insert(result);
}
}
//Tells the program what to do if the user wants to delete polynomials
else if (pick == 4)
{
//checks to see there are any polynomials to add together
if (count == 0)
{
Console.WriteLine("There are no polynomials in the list");
Console.WriteLine("");
}
//Asks the user which polynomial they want to delete and then deletes it
else
{
int del;
Console.WriteLine("Here is the list of Polynomials");
S.Print();
Console.WriteLine("Please enter the index of the polynomial you would like to delete");
del = Convert.ToInt32(Console.ReadLine());
S.Delete(del);
Console.WriteLine("Deleted");
Console.WriteLine("");
}
}
//Tells the program what to do if the user wants to evaluate a term
else if (pick == 5)
{
//Checks to see if there are any polynomials to evaluate
if (count == 0)
{
Console.WriteLine("There are no polynomials in the list");
Console.WriteLine();
}
//Asks the user which polynomial they want to evaluate, what value for x and then answers them
else
{
int Ret;
double x;
Console.WriteLine("Please enter the index of the polynomial you would like to evaluate");
Ret = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Please enter the x value you would like to use");
x = Convert.ToInt32(Console.ReadLine());
double answer;
answer = S.Retrieve(Ret).Evaluate(x);
Console.WriteLine("Your answer is:");
Console.WriteLine(answer);
Console.WriteLine("");
}
}
} while (pick != 6);
}
catch (ArgumentException e) { Console.WriteLine(e.Message); }
}