public void TestFactorial100()
{
// Arrangement
int number = 100;
BigInteger expectedValue = BigInteger.Parse("93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000");
Factorial myFact = new Factorial();
// Action
BigInteger currentValue = myFact.Calculate(number);
// Assert
Assert.AreEqual(expectedValue, currentValue);
}
public void TestFactorialZero()
{
// Arrangement
int number = 0;
int expectedValue = 1;
Factorial myFact = new Factorial();
// Action
BigInteger currentValue = myFact.Calculate(number);
// Assert
Assert.AreEqual(expectedValue, currentValue);
}
public static void Run()
{
Fibonacci.Draw(20);
int number = 6;
long fact = Factorial.Calculate(number);
WriteLine($"\nFactorial of {number} is {fact}");
number = 371;
WriteLine($"{number} is{(ArmstrongNumber.Find(number) ? "" : " NOT")} Armstrong Number");
}
public void BugFactorial13()
{
// Arrangement
int number = 13;
BigInteger expectedValue = 6227020800;
Factorial myFact = new Factorial();
// Action
BigInteger currentValue = myFact.Calculate(number);
// Assert
Assert.AreEqual(expectedValue, currentValue);
}
public void Calculate_100()
{
//arrange
var factorial = new Factorial();
var parsed = BigInteger.Parse("93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000");
//action
var result = factorial.Calculate(100);
//assert
Assert.AreEqual(parsed, result);
}
private void Bgw_DoWork(object sender, DoWorkEventArgs e)
{
myFact = new Factorial();
BigInteger result = myFact.Calculate((int)e.Argument);
if (myFact.CancelCalculate)
{
e.Cancel = true;
}
e.Result = result;
}
public void TestFactorialSixNormalCase()
{
// Arrangement
int number = 6;
int expectedValue = 720;
Factorial myFact = new Factorial();
// Action
BigInteger currentValue = myFact.Calculate(number);
// Assert
Assert.AreEqual(expectedValue, currentValue);
}
public void CalculateFactorialSmalNumber()
{
//Arrage
var expect = 6;
var number = 3;
Factorial factorial = new Factorial();
//Act
var result = factorial.Calculate(number);
//Assert
Assert.Equal(expect, result);
}
public static void GetsFactorialExceptionForNonPositiveNumbers(
[Random(-1000, -1, 10, Distinct = true)]
int input)
{
// Arrange
// Act
void Act() => Factorial.Calculate(input);
// Assert
_ = Assert.Throws <ArgumentException>(Act);
}
public void BugFactorial21()
{
// Arrangement
int number = 21;
BigInteger expectedValue =
BigInteger.Parse("51090942171709440000");
Factorial myFact = new Factorial();
// Action
BigInteger currentValue = myFact.Calculate(number);
// Assert
Assert.AreEqual(expectedValue, currentValue);
}
public void Test_GetEveryUniquePermutation(string word)
{
var permutations = Permutation.GetEveryUniquePermutation(word);
// We need to make sure that
// 1. We have the right number of permutations
// 2. Every string in permutations List is a permutation of word
// 3. There are no repetitions
// Start 1.
// The number of unique permutations is
// n!/(A1! * A2! * ... An!)
// where n is the length of word and Ai is the number of occurrences if ith char in the string
var charOccurrence = new Dictionary <char, int>();
foreach (var c in word)
{
if (charOccurrence.ContainsKey(c))
{
charOccurrence[c] += 1;
}
else
{
charOccurrence[c] = 1;
}
}
// now we know the values of A1, A2, ..., An
// evaluate the above formula
var expectedNumberOfAnagrams = Factorial.Calculate(word.Length);
expectedNumberOfAnagrams = charOccurrence.Aggregate(expectedNumberOfAnagrams, (current, keyValuePair) =>
{
return(current / Factorial.Calculate(keyValuePair.Value));
});
Assert.AreEqual(expectedNumberOfAnagrams, permutations.Count);
// End 1.
// Start 2
// string A is a permutation of string B if and only if sorted(A) == sorted(b)
var wordSorted = SortString(word);
foreach (var permutation in permutations)
{
Assert.AreEqual(wordSorted, SortString(permutation));
}
// End 2
// Start 3
Assert.AreEqual(permutations.Count, new HashSet <string>(permutations).Count);
// End 3
}
public void NumberLessThanOneFactorialIsOne()
{
//Arrange
var NumberUnderTestZero = 0;
var NumberUnderTestOne = 0;
//Act
var resultZero = Factorial.Calculate(NumberUnderTestZero);
var resultOne = Factorial.Calculate(NumberUnderTestOne);
//Assert
Assert.AreEqual(1, resultZero, "The factorial for 0 is not 1");
Assert.AreEqual(1, resultOne, "The factorial for 1 is not 1");
}
public override object Run(RunModes runMode, object input, bool Logging)
{
var sum = 0;
for (int i = 3; i < 1000000; i++)
{
if (i == 145)
{
sum += 0;
}
if (i.ToString().Select(item => Factorial.Calculate(Int32.Parse(item.ToString()))).Sum() == i)
{
sum += i;
}
}
return(sum);
}
/// <summary> /// Single term for cos(x) function approximation: (-1)^i * x^(2*i) / (2*i)!. /// </summary> /// <param name="x">Given point.</param> /// <param name="i">Term index from 0 to n.</param> /// <returns>Single term value.</returns> private static double CosTerm(double x, int i) => Math.Pow(-1, i) / Factorial.Calculate(2 * i) * Math.Pow(x, 2 * i);
/// <summary> /// Single term for e^x function approximation: x^i / i!. /// </summary> /// <param name="x">Given point.</param> /// <param name="i">Term index from 0 to n.</param> /// <returns>Single term value.</returns> private static double ExpTerm(double x, int i) => Math.Pow(x, i) / Factorial.Calculate(i);
public void FactorialTestsByNegative()
{
var calculator = new Factorial();
var result = calculator.Calculate(-4);
}
/// <summary> /// Single term for sin(x) function approximation: (-1)^i * x^(2*i + 1) / (2*i + 1)!. /// </summary> /// <param name="x">Given point.</param> /// <param name="i">Term index from 0 to n.</param> /// <returns>Single term value.</returns> private static double SinTerm(double x, int i) => (Math.Pow(-1, i) / Factorial.Calculate(2 * i + 1)) * Math.Pow(x, 2 * i + 1);
public void ShouldThrowFactorialException()
{
var result = Factorial.Calculate(NegativeInteger);
}
public void ShouldCalculateFactorial()
{
var result = Factorial.Calculate(ZeroInteger);
Assert.AreEqual(1, result);
}
static void Main(string[] args)
{
int n = int.Parse(Console.ReadLine());
Console.WriteLine(Factorial.Calculate(n));
}
public void ShouldCalculateFractorial()
{
var result = Factorial.Calculate(PositiveInteger);
Assert.AreEqual(5040, result);
}
public static string Process(string input1, string input2, string input3)
{
string output = string.Empty;
switch (input3)
{
case "add":
output = Addition.Add(input1, input2).ToString();
break;
case "subtraction":
output = Subtraction.Sub(input1, input2).ToString();
break;
case "multiplication":
output = Multiplication.Mul(input1, input2).ToString();
break;
case "division":
output = Division.Div(input1, input2).ToString();
break;
case "divby3notby6":
output = Divisionbythreenotbysix.Run(input1).ToString();
break;
case "armstrongornot":
output = Armstrongnumber.Check(input1).ToString();
break;
case "factorial":
output = Factorial.Calculate(input1).ToString();
break;
case "palindrome":
output = PalindromeNumber.Find(input1).ToString();
break;
case "reverse":
output = ReverseNumber.Reverse(input1).ToString();
break;
case "sumofdigits":
output = Sumofdigits.Find(input1).ToString();
break;
case "decimaltobinary":
output = DecimaltoBinary.Converts(input1).ToString();
break;
case "numberincharacter":
output = NumbersInCharacters.Print(input1).ToString();
break;
case "strreverse":
output = StringReverse.Reverse(input1).ToString();
break;
case "duplicate":
output = DuplicateElement.Find(input1).ToString();
break;
case "unique":
output = UniqueElement.Return(input1).ToString();
break;
case "strpalindrome":
output = StringPalindrome.Find(input1).ToString();
break;
case "length":
output = StringLength.Calculate(input1).ToString();
break;
case "vowels":
output = NumofVowels.Print(input1).ToString();
break;
case "search":
output = CharacterSearching.Search(input1, input2).ToString();
break;
case "count":
output = WordCount.Count(input1).ToString();
break;
case "date":
output = DateandTime.Calculate(input1).ToString();
break;
}
return(output);
}
