The Time in Words(Hacker Rank)

string timeInWords(int h, int m)

 {

    map<int,string>sen;

    string ans;

    sen[1] = "one";

    sen[2] = "two";

    sen[3] = "three";

    sen[4] = "four";

    sen[5] = "five";

    sen[6] = "six";

    sen[7] = "seven";

    sen[8] = "eight";

    sen[9] = "nine";

    sen[10] = "ten";

    sen[11] = "eleven";

    sen[12] = "twelve";

    sen[13] = "thirteen";

    sen[14] = "fourteen";

    sen[15] = "quarter";

    sen[16] = "sixteen";

    sen[17] = "seventeen";

    sen[18] = "eighteen";

    sen[19] = "nineteen";

    sen[20] = "twenty";

    sen[21] = sen[20] + " "+ sen[1];

    sen[22] = sen[20] + " "+ sen[2];

    sen[23] = sen[20] + " "+ sen[3];

    sen[24] = sen[20] + " "+ sen[4];

    sen[25] = sen[20] + " "+ sen[5];

    sen[26] = sen[20] + " "+ sen[6];

    sen[27] = sen[20] + " "+ sen[7];

    sen[28] = sen[20] + " "+ sen[8];

    sen[29] = sen[20] + " "+ sen[9];

    sen[30] = "half";

    if (m == 0)

    {

        ans = sen[h] + " o' clock";

    }

    else if (m <= 30)

    {

        string tmp1 = ((m) == 1 ? "" : "s");

        string tmp2 = (m != 30 && m != 15 ? " minute"+ tmp1 : "");

        ans = sen[m] + tmp2 + " past "+ sen[h];

    }

    else if (m > 30)

     {

        string tmp1 = ((m) == 1 ? "" : "s");

        ans = sen[60 - m]+ (m != 45 ? " minute" + tmp1 : "")+ " to " + sen[h + 1];

    }

    return ans;

}