brad sue

Hi ,
I have this problem I need to code in C++:

we want to know how many candies you can have with a certain amount of money.
Each candy costs $1 and at each candy purchase, you receive 1 coupon.
but you can redeem 1 candy with 7 coupons.

If you have $20, you can have 23 candies.
20/7=2 more candies from the coupons=2 more coupons.
then 20%7=6 coupons remain.

6+2=8 coupons with which you can have 1 candy.

So 20+2+1=23 candies in total ( with 2 coupon left).

I wrote this code below. The starnge problem I have is that when I run it with $20 as total cash, it gives me a number of coupons equal to 68???
It should be 20 at the beginning!

[code]

#include<iostream>
using namespace std;

int main()
{
int candies,cash,coupon,finish;
int new_candies=0;
candies=cash;
coupon=cash;

cout<<"Enter the amount of money: ";
cin>>cash;// I enter 20.
cout<<endl;

new_candies=coupon/7;

cout<<"coupon"<<coupon<<endl;// it gives 68
cout<<"New candies"<<new_candies<<endl;//9 that's ok since coupon=68

while (coupon>7)
{
new_candies=coupon/7;
candies+=new_candies;
coupon-=new_candies*6;
}

cout<<candies<<endl;

cin>>finish; //to keep the output window open
return 0;
}
[\code]

can you tell me what is going on? or it is my compiler (DEV-C++) that bugs?

thank you.
B