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Language/Type: PHP loops while loops parameters mod

Write a function named show_twos that shows the factors of 2 in a given integer. For example, the following calls:


should produce this output:

0 = 0
5 = 5
18 = 2 * 9
68 = 2 * 2 * 17
-68 = 2 * 2 * -17
120 = 2 * 2 * 2 * 15

The idea is to express the number as a product of factors of 2 and an odd number. The number 120 has 3 factors of 2 multiplied by the odd number 15. For odd numbers (e.g. 7), there are no factors of 2, so you just show the number itself.

If passed a negative integer, the only negative multiple in the result should be the last multiplied value, as shown in the above example for show_twos(-68).

You may assume that the value passed is an Integer type.

Function: Write a PHP function as described, not a complete program.

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