How do i...i solve this can you give me the code

Mr. Stephen is working in a translator company. His task is to translate the given cash (positive integer number) into words. He found that maximum cash value cannot be more than 10000000000. Write the C++ code to help Mr. Stephen.

 #include <iostream>
using namespace std;
 
// strings at index 0 is not used, it is to make array
// indexing simple
string one[] = { "", "one ", "two ", "three ", "four ",
                 "five ", "six ", "seven ", "eight ",
                 "nine ", "ten ", "eleven ", "twelve ",
                 "thirteen ", "fourteen ", "fifteen ",
                 "sixteen ", "seventeen ", "eighteen ",
                 "nineteen " };
 
// strings at index 0 and 1 are not used, they are to
// make array indexing simple
string ten[] = { "", "", "twenty ", "thirty ", "forty ",
                 "fifty ", "sixty ", "seventy ", "eighty ",
                 "ninety " };
 
// n is 1- or 2-digit number
string numToWords(int n, string s)
{
    string str = "";
    // if n is more than 19, divide it
    if (n > 19)
        str += ten[n / 10] + one[n % 10];
    else
        str += one[n];
 
    // if n is non-zero
    if (n)
        str += s;
 
    return str;
}
 
// Function to print a given number in words
string convertToWords(long n)
{
    // stores word representation of given number n
    string out;
 
    // handles digits at ten millions and hundred
    // millions places (if any)
    out += numToWords((n / 10000000), "crore ");
 
    // handles digits at hundred thousands and one
    // millions places (if any)
    out += numToWords(((n / 100000) % 100), "lakh ");
 
    // handles digits at thousands and tens thousands
    // places (if any)
    out += numToWords(((n / 1000) % 100), "thousand ");
 
    // handles digit at hundreds places (if any)
    out += numToWords(((n / 100) % 10), "hundred ");
    out += numToWords(((n/100) %10), "tens");
 
    if (n > 100 && n % 100)
       // out += "and ";
 
    // handles digits at ones and tens places (if any)
    out += numToWords((n % 100), "");
   
    //Handling the n=0 case
    if(out=="")
    out = "zero";
 
    return out;
}
 
// Driver code
int main()
{
    int num,temp,length=0,result,n,m=0;
    cin>>num;
    temp=num;
    
    cout << convertToWords(n) << endl;
    
    return 0;
}