public void Test1()
{
/*
* For example, 10! = 10 × 9 × ... × 3 × 2 × 1 = 3628800,
* and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.
*/
var sut = new E020Factorialdigitsum();
int digitsumExpected = 27;
int digitsum = sut.GetFactorialdigitsum(10);
Assert.Equal(digitsumExpected, digitsum);
}
public void Solution()
{
/*
* Find the sum of the digits in the number 100!
*/
var sut = new E020Factorialdigitsum();
int digitsumExpected = 648;
int digitsum = sut.GetFactorialdigitsum(100);
Assert.Equal(digitsumExpected, digitsum);
/*
* Congratulations, the answer you gave to problem 20 is correct.
*
* You are the 175886th person to have solved this problem.
*/
}
