The following arrays contain one digit ( both cardinal and ordinal forms ) , two digit ( < 20 , ordinal forms ) numbers , and multiples ( ordinal forms ) and powers of 10.
string single_digits_temp [ ] = { " " , " one " , " two " , " three " , " four " , " five " , " six " , " seven " , " eight " , " nine " } ; string single_digits [ ] = { " " , " first " , " second " , " third " , " fourth " , " fifth " , " sixth " , " seventh " , " eighth " , " ninth " } ; string two_digits [ ] = { " " , " tenth " , " eleventh " , " twelfth " , " thirteenth " , " fourteenth " , " fifteenth " , " sixteenth " , " seventeenth " , " eighteenth " , " nineteenth " } ; string tens_multiple [ ] = { " " , " tenth " , " twentieth " , " thirtieth " , " fortieth " , " fiftieth " , " sixtieth " , " seventieth " , " eightieth " , " ninetieth " } ; string tens_power [ ] = { " hundred " , " thousand " } ; string word = " " ;