CS 161 - Introduction to Programming with PHP
<?php
echo "Purchase amount? ";
$amount=trim(fgets(STDIN));
echo "Payment amount? ";
$payment=trim(fgets(STDIN));
$change=$payment-$amount;
$dollars=(int)($change/1.0);
$change-=$dollars;
$quarters=(int)($change/0.25);
$change-=$quarters*0.25;
$dimes=(int)($change/0.10);
$change-=$dimes*0.10;
$nickels=(int)($change/0.05);
$change-=$nickels*0.05;
$pennies=(int)(($change+0.009)*100);
echo "Change (".($payment-$amount).") returned as: \n";
echo " $dollars dollar bills,\n";
echo " $quarters quarters,\n";
echo " $dimes dimes,\n";
echo " $nickels nickels,\n";
echo " and $pennies pennies.\n";
?>