Hello there, Here is a python code to convert what ever number you enter into words. First it will take a input. It wont ask with any message. Then it give back the number in words form. Here is no any code to handle unexpected user input. This program works for once to Hundred Billion.
Sample input:-
104382426112
Expected Output:-
One Hundred Four Billion Three Hundred Eighty Two Million Four Hundred Twenty Six Thousand One Hundred Twelve

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one = ['', 'One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine']
tenp = ['Ten', 'Eleven', 'Twelve', 'Thirteen', 'Fourteen', 'Fifteen', 'Sixteen', 'Seventeen', 'Eighteen', 'Nineteen']
tenp2 = ['', '', 'Twenty', 'Thirty', 'Forty', 'Fifty', 'Sixty', 'Seventy', 'Eighty', 'Ninety']


def once(num):
    word = ''
    word = one[int(num)]
    word = word.strip()
    return word


def ten(num):
    word = ''
    if num[0] == '1':
        word = tenp[int(num[1])]
    else:
        text = once(num[1])
        word = tenp2[int(num[0])]
        word = word + " " + text
    word = word.strip()
    return word


def hundred(num):
    word = ''
    text = ten(num[1:])
    word = one[int(num[0])]
    if num[0] != '0':
        word = word + " Hundred "
    word = word + text
    word = word.strip()
    return word


def thousand(num):
    word = ''
    pref = ''
    text = ''
    length = len(num)
    if length == 6:
        text = hundred(num[3:])
        pref = hundred(num[:3])
    if length == 5:
        text = hundred(num[2:])
        pref = ten(num[:2])
    if length == 4:
        text = hundred(num[1:])
        word = one[int(num[0])]
    if num[0] != '0' or num[1] != '0' or num[2] != '0':
        word = word + " Thousand "
    word = word + text
    if length == 6 or length == 5:
        word = pref + word
    word = word.strip()
    return word


def million(num):
    word = ''
    pref = ''
    text = ''
    length = len(num)
    if length == 9:
        text = thousand(num[3:])
        pref = hundred(num[:3])
    if length == 8:
        text = thousand(num[2:])
        pref = ten(num[:2])
    if length == 7:
        text = thousand(num[1:])
        word = one[int(num[0])]
    if num[0] != '0' or num[1] != '0' or num[2] != '0' :
        word = word + " Million "
    word = word + text
    if length == 9 or length == 8:
        word = pref + word
    word = word.strip()
    return word


def billion(num):
    word = ''
    pref = ''
    text = ''
    length = len(num)
    if length == 12:
        text = million(num[3:])
        pref = hundred(num[:3])
    if length == 11:
        text = million(num[2:])
        pref = ten(num[:2])
    if length == 10:
        text = million(num[1:])
        word = one[int(num[0])]
    if num[0] != '0':
        word = word + " Billion "
    word = word + text
    if length == 12 or length == 11:
        word = pref + word
    word = word.strip()
    return word


# 104382426112 One Hundred Four Billion Three Hundred Eighty Two Million Four Hundred Twenty Six Thousand One HUndred Twelve

test = int(input())
a = str(test)
leng = len(a)
if leng == 1:
    if a == '0':
        num = 'Zero'
    else:
        num = once(a)
if leng == 2:
    num = ten(a)
if leng == 3:
    num = hundred(a)
if leng > 3 and leng < 7:
    num = thousand(a)
if leng > 6 and leng < 10:
    num = million(a)
if leng > 9 and leng < 13:
    num = billion(a)
print(num)

If you found it useful or if you are in need of it you can use it for any purpose. You can it extend to use for Trillion and so on.....

Define a class to represent a bank account. Include the following members:
  1. Data Members:
    1. Name of the account holder
    2. Account number
    3. Balance Amount in account
  2. Member Function:
    1. Open an account
    2. Deposit and Withdraw Fund
    3. Display account information
Write a program to test this class for 10 customers.

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#include<iostream>
#include<stdio.h>
using namespace std;
class Bank
{
    char name[30];
    double accountno;
	double balance;
    public:
        Bank():balance(0){};
        void create_account(int a);
        void deposit();
        void withdraw();
        void display();
};
void Bank::create_account(int a)
{
    accountno=a;
    cout<<"* Enter Name:- ";
    cin>>name;
    cout<<"***********Account Successfully Created*******"<<endl;
    cout<<"* You Account no is:- "<<a<<endl;

}
void Bank::deposit()
{
	double add;
	cout<<"* Enter Deposite Value:- ";
    cin>>add;
    balance=add+balance;
    cout<<"***********Balance Successfully Deposited*******"<<endl;
}
void Bank::withdraw()
{
	double add;
	cout<<"* Enter Withdraw Value:- ";
    cin>>add;
    if(add<balance){
        cout<<"***********Balance Successfully Withdraw*******"<<endl;
        balance=balance-add;
    }else
        cout<<"***********Problem on Balance Withdraw (Balance Insufficent)*******"<<endl;
}

void Bank::display()
{
	cout<<"* Name:- "<<name<<endl;
    cout<<"* Account no.:- "<<accountno<<endl;
    cout<<"* Current Balance:- "<<balance<<endl;
}

int main()
{
	Bank A[10];
    int a,account,cnum=0;
    int b;
    cout<<"* * * * * * * * * * * * * * * * * * *"<<endl;
    do{
        cout<<"*\tSelect"<<endl<<"*\t1:- To Create Account"<<endl<<"*\t2:- To Deposite"<<endl<<"*\t3:- To Withdraw"<<endl<<"*\t4:- To View Details"<<endl<<"*\t5:- Exit the Program"<<endl<<"* ";
        cin>>a;
    switch(a){
        case 1:
      	{
      		cnum++;
            A[cnum].create_account(cnum);
            cout<<"* Do you want to Process again? (Enter 1 for Yes)";
            cin>>b;
            break;
     	 }
     	 case 2:
     	 {
            cout<<"* Enter Account no:- ";
            cin>>cnum;
            A[cnum].deposit();
            cout<<"* Do you want to Process again? (Yes=1 / NO=2)";
            cin>>b;
            break;
     	 }
     	 case 3:
      	{
      		cout<<"* Enter Account no:- ";
            cin>>cnum;
            A[cnum].withdraw();
            cout<<"* Do you want to Process again? (Yes=1 / NO=2)";
            cin>>b;
            break;
     	 }
     	 case 4:
      	{
            cout<<"* Enter Account no:- ";
            cin>>cnum;
            A[cnum].display();
            cout<<"* Do you want to Process again? (Yes=1 / NO=2)";
            cin>>b;
            break;
     	 }
     	 case 5:
      	{
      		cout<<"* Thanks For Using this Program";
            b = 2;
            break;
     	 }
     	 default:
     	 {
            cout<<"* Please Enter the Selected Option";
            b = 1;
     	 }
   	}
    }while(b == 1);
   return 0;
}

Here is the Output:-

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