[hacker rank] The time in words

문제 링크

 

코드

string timeInWords(int h, int m) {
    std::string time[] = {
        "o' clock", "one", "two", "three", "four", "five",
        "six", "seven", "eight", "nine", "ten",
        "eleven", "tweleve", "thirteen", "fourteen", "quarter",
        "sixteen", "seventeen", "eighteen", "nineteen", "twenty"        
    };
    const int size = 40;
    char buf[size] = {};
    if (0 == m)
        snprintf(buf, size, "%s %s", time[h].c_str(), time[m].c_str());
    else if (1 == m)
        snprintf(buf, size, "%s minute past %s", time[m].c_str(), time[h].c_str());
    else if (m <= 14)
        snprintf(buf, size, "%s minutes past %s", time[m].c_str(), time[h].c_str());
    else if (15 == m)
        snprintf(buf, size, "%s past %s", time[m].c_str(), time[h].c_str());
    else if (m <= 20)
        snprintf(buf, size, "%s minutes past %s", time[m].c_str(), time[h].c_str());
    else if (m <= 29)
        snprintf(buf, size, "%s %s minutes past %s", time[20].c_str(), time[m-20].c_str(), time[h].c_str());
    else if (30 == m)
        snprintf(buf, size, "half past %s", time[h].c_str());
    else if (m <= 39)
        snprintf(buf, size, "%s %s minutes to %s", time[20].c_str(), time[40-m].c_str(), time[h+1].c_str());
    else if (m <= 44)
        snprintf(buf, size, "%s minutes to %s", time[60 - m].c_str(), time[h + 1].c_str());
    else if (45 == m)
        snprintf(buf, size, "quarter to %s", time[h + 1].c_str());
    else if (m <= 59)
        snprintf(buf, size, "%s minutes to %s", time[60-m].c_str(), time[h + 1].c_str());
    std::string answer = buf;
    return answer;
}