Floating point fun

diff.zsh

#!/usr/bin/zsh
money=103.4
print "ruby vs python:"
diff <(echo $money | ruby ex12b.rb) <(echo $money | python3 ex12b.py) && print "No changes"
print "ruby vs java:"
diff <(echo $money | ruby ex12b.rb) <(echo $money | java ex12b) && print "No changes"

ex12b.java

import java.util.*;

class ex12b
{
    public static void main(String args[])
    {
        System.out.print("Give me some money: ");
        Scanner in = new Scanner(System.in);
        float money = Float.parseFloat(in.next());
        float change = money * .1f;
        System.out.println("Your change is $" + change + "!");
    }
}

ex12b.py

money = input("Give me some money: ")
money = float(money.strip())
change = money * .1
print("Your change is $%s!" % change)

ex12b.rb

print "Give me some money: "
money = gets.chomp.to_f
change = money * 0.1
puts "Your change is $#{change}!"