题解 | #学英语#

#include<iostream>
#include<vector>
using namespace std;
vector<string>ge={"zero", "one", "two", "three", "four", "five", "six", "seven",
                           "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen",
                           "fifteen", "sixteen", "seventeen", "eighteen", "ninteen"};
vector<string>shi={"none", "ten", "twenty", "thirty", "forty", "fifty", "sixty",
                          "seventy", "eighty", "ninety"};

string getData(int num)
{
    if(num>=0&&num<=19)
    {
        return ge[num];
    }
    else if(num>=20&&num<=99)
    {
        if(num%10==0)
        {
            return shi[num/10];
        }
        else
        {
            return shi[num/10]+" "+getData(num%10);
        }
    }
    else if(num>=100&&num<=999)
    {
        if(num%100==0)
        {
            return ge[num/100]+" hundred";
        }
        else{
            return getData(num/100)+" hundred and "+getData(num%100);
        }
    }
    else if(num>=1000&&num<=999999)
    {
         if(num%1000==0)
        {
            return ge[num/1000]+" thousand";
        }
        else{
            return getData(num/1000)+" thousand "+getData(num%1000);
        }
    }
    else if(num>=1000000&&num<=999999999)
    {
         if(num%1000000==0)
        {
            return ge[num/1000000]+" million";
        }
        else{
            return getData(num/1000000)+" million "+getData(num/1000%1000)+" thousand "+getData(num%1000);
        }
    }
    else if(num>=1000000000){
        if(num%1000000000==0)
            return ge[num/1000000000]+" billion";
        return getData(num/1000000000)+" billion "+getData(num%10000000/1000000)+" million "+getData(num%1000000/1000)+" thousand "+getData(num%1000);
    }
}
int main()
{
    int num;
    while(cin>>num)
    {
        cout<<getData(num)<<endl;
    }
    return 0;
}