static void Main(string[] args)
{
var ass = Expr.Parse("cos(2 / 5 * pi) + cos(4 / 5 * pi) - cos(6 / 5 * pi) - cos(8 / 5 * pi)");
Console.WriteLine(ass.TrigonometricContract());
Console.WriteLine(ass.TrigonometricExpand());
Console.WriteLine(ass.TrigonometricSimplify());
Console.WriteLine(ass.Evaluate(new Dictionary <string, FloatingPoint>()));
Console.WriteLine(ass.RationalReduce());
}
public static double EvaluateExpression(string input)
{
if (input.Any(char.IsLetter))
{
//there is a letter (variable) that has not been dealt with, so the expression will fail
return(0.0);
}
else
{
//try this, might need to do .Compile("")(0);
return(Expr.Parse(input).RealNumberValue);
}
}
static void Main(string[] args)
{
var x = Expr.Variable("x");
var a = Expr.Variable("a");
string poly = "5x^2+3x+5";
int start;
int count;
int end;
int posOfx;
//int counting;
List <int> coeff = new List <int>();
end = poly.Length;
start = 0;
count = 0;
posOfx = 0;
//counting = 0;
while ((start <= end) && (posOfx > -1))
{
count = end - start;
posOfx = poly.IndexOf('x', start, count);
if (posOfx == -1)
{
break;
}
start = posOfx + 1;
coeff.Add(posOfx);
}
Console.WriteLine(coeff[0]);
foreach (int y in coeff)
{
Console.WriteLine(coeff[y]);
}
Console.ReadLine();
// menu();
}
