public int GetLettersused(int from, int to)
{
int lettersused = 0;
for (int i = from; i <= to; i++)
{
lettersused += WritenNumbers.LetterCount(WritenNumbers.from(i));
}
return(lettersused);
}
public void TestWritenNumbers()
{
/*
* If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3 + 3 + 5 + 4 + 4 = 19 letters used in total.
*
* NOTE: Do not count spaces or hyphens.
* For example, 342 (three hundred and forty-two) contains 23 letters and 115 (one hundred and fifteen) contains 20 letters.
* The use of "and" when writing out numbers is in compliance with British usage.
* //*/
Assert.Equal("one", WritenNumbers.from(1));
Assert.Equal("ten", WritenNumbers.from(10));
Assert.Equal("eleven", WritenNumbers.from(11));
Assert.Equal("nineteen", WritenNumbers.from(19));
Assert.Equal("twenty-two", WritenNumbers.from(22));
Assert.Equal("thirty", WritenNumbers.from(30));
Assert.Equal("seventy-seven", WritenNumbers.from(77));
Assert.Equal("one hundred", WritenNumbers.from(100));
Assert.Equal("three hundred and sixty", WritenNumbers.from(360));
Assert.Equal("three hundred and sixty-five", WritenNumbers.from(365));
Assert.Equal("one thousand", WritenNumbers.from(1000));
Assert.Equal("three hundred and forty-two", WritenNumbers.from(342));
Assert.Equal("one hundred and fifteen", WritenNumbers.from(115));
}