Thread: help with calculating change from a dollar

i know this is probably something really simple, but i just cant figure it out. here is the code. i know i should be able to calculate it without using the newchange variable. any help is appreciated.

Code:

#include <iostream>

using namespace std;

void main()
{
	// Programmer: Mike Gozdiskowski
	// Date: 9/13/2002
	// Discussion: An interactive program to calculate the change 
	// from a vending machine

	// Input: Cost of item purchased (an integer between 0 and 100 inclusive)
	// Output: Change is quarters, dimes, nickels, and cents

	// Declaration and description of variables
	long cost;	// Cost of item purchased in cents
	long change;	// Amount of change in cents
	long quarters;	// Number of quarters in change
	long dimes;  //Number of dimes in change
	long nickels;  //Number of nickels in change
	long pennies;  //Number of pennies in change
	long newchange;  //Variable used to store temporary amount of change for each coin

	// Welcome user and get amount of purchase
	cout<<"Welcome to the cash register!"<<endl;
	cout<<"Please enter the amount of your purchase: ";
	cin>>cost;

	// Calculate the total change due
	change=(100-cost);

	// Calculate the number of quarters, dimes, and nickels in change
	quarters=change/25;
	newchange=change-quarters*25;
	dimes=newchange/10;
	newchange=newchange-dimes*10;
	nickels=newchange/5;
	newchange=newchange-nickels*5;
	pennies=newchange/1;

	// Print the results and exit program
	cout<<"Total change due: "<<change<<" cents"<<endl;
	cout<<"Your change is"<<endl;
	cout<<"       "<<quarters<< "quarter(s)"<<endl;
	cout<<"       "<<dimes<< "dime(s)"<<endl;
	cout<<"       "<<nickels<< "nickel(s)"<<endl;
	cout<<"       "<<pennies<< "pennie(s)"<<endl;

}

i did try something like this originally but i could not get it to work right so i just created a new variable. it would put the correct output only for some numbers.

Code:

// Calculate the number of quarters, dimes, and nickels in change
	quarters=change/25;
	dimes=(change%25)/10;
	nickels=(change%10)/5;
	pennies=(change%5)/1;