public string Equation()
{
string _operation = operations[(int)Random.Range(0,(operations.Count-1))] as string;
int temp = (int)Random.Range(0,10);
switch(_operation){
case "+":
EqFormat(temp,_operation);
operation = EquationOperation.ADDITION;
break;
case "-":
EqFormat(temp,_operation);
operation = EquationOperation.SUBTRACTION;
break;
case "x":
if(temp<1) temp = (int)Random.Range(1,9);
EqFormat(temp,_operation);
operation = EquationOperation.MULTIPLICATION;
break;
case "/":
while(true){
if(!solution.Equals(0) && !temp.Equals(0)) break;
solution = (int)Random.Range(1,9);
temp = (int)Random.Range(1,9);
}
EqFormat(temp,_operation);
operation = EquationOperation.DIVISION;
break;
default: //wtf
break;
}
return equation;
}
public EquationViewModel()
{
Operation = new EquationOperation();
linearCommand = new EquationCommand(Linear);
powerFunctionCommand = new EquationCommand(PowerFunc);
exponentialCommand = new EquationCommand(Exponential);
}
/// <summary>
/// Consists of a collection of expressions in brackets (if there are in the string) and a list of summands (contained between brackets, if any).
/// If there are no brackets, then the monomial consists of one summand)
/// </summary>
/// <param name="monomialString"></param>
/// <returns></returns>
public static Monomial Parse(string monomialString)
{
if (monomialString == null)
{
throw new ArgumentNullException(nameof(monomialString));
}
if (monomialString.IsNullOrWhiteSpace())
{
throw new ArgumentException(nameof(monomialString));
}
var summandItems = ParseHelper.GetSummandsForMonomial(monomialString);
//default value:
//for brackets - 1 '(x-1) -> 1(x-1)'
//otherwise - 0 'x^0 + a -> 1+a'
var summand = summandItems.summandItems.Select(SummandParser.Parse).Multiply()
?? new Summand(summandItems.bracketsParts.Count > 0 ? 1 : 0);
IEnumerable <Summand> resultSummands = summand != null ? new [] { summand } : new Summand[] { };
IEnumerable <Summand> result = resultSummands;
foreach (var part in summandItems.bracketsParts)
{
var rightItems = PolynomialParser.Parse(part).Normalize().Summands.Sum();
result = EquationOperation.Multiply(result, rightItems);
}
resultSummands = result.Sum();
return(new Monomial(resultSummands ?? new Summand[] {}));
}
public void Test_PowerMethod()
{
EquationOperation Operation = new EquationOperation();
bool cond = Operation.OperationFunction(Equation.PowerFunction, 1.0, 2.0);
Assert.AreEqual(cond, true);
}
public void Test_ExponentialMethod()
{
EquationOperation Operation = new EquationOperation();
bool cond = Operation.OperationFunction(Equation.Exponential, 1.0, 2.0);
Assert.AreEqual(cond, true);
}
public void Test_ExponentialMethodData()
{
EquationOperation Operation = new EquationOperation();
Operation.SetDefaultData();
bool cond = Operation.OperationFunction(Equation.Linear, 0, 0);
List <DataPoint> data = Operation.GetPoints();
Assert.AreEqual(data[0].X, 1);
Assert.AreEqual(data[0].Y, 1);
Assert.AreEqual(cond, true);
}
