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But but but...

It's all very well to say you will use integer arithmetic internally

But you really can't avoid fractions

The input numbers might be fractions

Holman's original version:

        % echo 1.1 1.9 2.1 2.9 4.1 4.9 | spark                                 
        ./spark: line 86: 4.9 / 7 : syntax error: invalid arithmetic operator
                  (error token is ".9 / 7 ")

My version is better:

        % echo 1.1 1.9 2.1 2.9 4.1 4.9 |./spark                                 
        ▂▃▃▄▅▆