#include <iostream>
using namespace std;
int main()
{
int note10,note50,note100;
cout<<"enter the withdrawn ammount"
cin>>amount;

//This is your lowest denomination, so when we get to this point, we know we don't need to continue to calculate change with this loop.
while(change < 10)
{
     //Test for your largest denomination first
     if(amount / 100)
     {
          //adjust user inputed amount to withdraw
          amount -= 100;
          //keep a running counter of how many $100 bills ye' have issued thus far
          hundreds++;
     }
     else if(amount / 50)
     {
          amount -= 50;
          fifties++
      }
...
...
...
etc etc.
 
cout << "You get " << hundreds << " x $100" <<endl;
cout << "You get " << fifties << " x $50"<<endl;
cout << "You get " << tens << " x $10" <<endl;
cout << "Remaining money:   $" << amount;