Задача на языке C++

#include <iostream>
#define LIMIT 100
using namespace std;
void e_print(char e)
{
switch (e)
{
case 1:
cout << "один" << endl;
break;
case 2:
cout << "два" << endl;
break;
case 3:
cout << "три" << endl;
break;
case 4:
cout << "четыре" << endl;
break;
case 5:
cout << "пять" << endl;
break;
case 6:
cout << "шесть" << endl;
break;
case 7:
cout << "семнь" << endl;
break;
case 8:
cout << "восемнь" << endl;
break;
case 9:
cout << "девять" << endl;
break;
};
}
int main()
{
unsigned a;
do
{
cout << "Введите a: ";
cin >> a;
if (a == 0 || a >= LIMIT) cerr << "Число должно быть больше нуля и меньше " << LIMIT << '.' << endl;
} while (a == 0 || a >= LIMIT);

unsigned d,e;
d = a/10;
e = a - d*10;

switch (d)
{
case 9:
cout << "девяносто ";
e_print(e);
break;
case 8:
cout << "восемьдесят ";
e_print(e);
break;
case 7:
cout << "семьдесят ";
e_print(e);
break;
case 6:
cout << "шестьдесят ";
e_print(e);
break;
case 5:
cout << "пятьдесят ";
e_print(e);
break;
case 4:
cout << "сорок ";
e_print(e);
break;
case 3:
cout << "тридцать ";
e_print(e);
break;
case 2:
cout << "двадцать ";
e_print(e);
break;
case 1:
{
switch (e)
{
case 0:
cout << "десять" << endl;
break;
case 1:
cout << "одиннадцать" << endl;
break;
case 2:
cout << "двенадцать" << endl;
break;
case 3:
cout << "тринадцать" << endl;
break;
case 4:
cout << "четырнадцать" << endl;
break;
case 5:
cout << "пятнадцать" << endl;
break;
case 6:
cout << "шестнадцать" << endl;
break;
case 7:
cout << "семнадцать" << endl;
break;
case 8:
cout << "восемнадцать" << endl;
break;
case 9:
cout << "девятнадцать" << endl;
break;
};
break;
};
case 0:
e_print(e);
break;
};

return 0;
}