#include <iostream>

using std::cout; using std::cin; using std::endl;

int main(){

//inputs a number seperated by space between 0 1 and 9 9
int first_num;
int second_num;
cout << "Enter number between 0 1 and 9 9: " ;
cin >> first_num;
cin >> second_num;

if (first_num == 1){

switch (second_num){

case 0:
cout << "Ten" << endl;
return(0);
case 1:
cout << "Eleven" << endl;
return(0);
case 2:
cout << "Twelve" << endl;
return(0);
case 3:
cout << "Thirteen" << endl;
return(0);
case 4:
cout << "Fourteen" << endl;
return(0);
case 5:
cout << "Fifteen" << endl;
return(0);
case 6:
cout << "Sixteen" << endl;
return(0);
case 7:
cout << "Seventeen" << endl;
return(0);
case 8:
cout << "Eighteen" << endl;
return(0);
case 9:
cout << "Nineteen" << endl;
return(0);
}
}

else {
switch (first_num){

case 0 :
cout << "" ;
break;
case 2 :
cout << "Twenty " ;
break;
case 3 :
cout << "Thirty " ;
break;
case 4 :
cout << "Fourty " ;
break;
case 5 :
cout << "Fifty " ;
break;
case 6 :
cout << "Sixty " ;
break;
case 7:
cout << "Seventy " ;
break;
case 8:
cout << "Eighty " ;
break;
case 9:
cout << "Ninety " ;
break;
default:
cout << "Invalid Number" << endl;
return(0); //Deals with cases where first number is > 9
}
}

switch (second_num){

case 0 :
cout << "" ;
break;
case 1:
cout << "One" << endl;
break;
case 2:
cout << "Two" << endl;
break;
case 3:
cout << "Three" << endl;
break;
case 4:
cout << "Four" << endl;
break;
case 5:
cout << "Five" << endl;
break;
case 6:
cout << "Six" << endl;
break;
case 7:
cout << "Seven" << endl;
break;
case 8:
cout << "Eight" << endl;
break;
case 9:
cout << "Nine" << endl;
break;
default:
cout << "Invalid Number" << endl;
return(0);//Deals with cases where second number is > 9
}
}

#include <whatever>

using namespace std;