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nshizirungudieumerci@gmail.comnshizirungudieumerci@gmail.com
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added a parsons problem to the inheritance section
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‎source/ch6_definingclasses.ptx‎

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@@ -961,6 +961,38 @@ public void test(Number a, Number b) {
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You will <em>still get this error</em> even if all your code that calls this <c>test</c> method passes two <c>Fractions</c> as parameters (remember that <c>Fraction</c> does implement <c>add</c>).
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</p>
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</subsection>
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<exercise xml:id="java-inheritance-parsons-exercise" label="java-inheritance-parsons">
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<statement>
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<p>
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Construct the <c>toString</c> method for the <c>Fraction</c> class so that printing a
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fraction shows it in the form numerator/denominator. Drag the blocks into the correct order on the right.
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</p>
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</statement>
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<blocks>
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<block order="1">
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<choice correct="yes">
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<cline>public String toString() {</cline>
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</choice>
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<choice correct="no">
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<cline>public void toString() {</cline>
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</choice>
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</block>
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<block order="2">
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<choice correct="yes">
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<cline> return numerator.toString() + "/" + denominator.toString();</cline>
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</choice>
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<choice correct="no">
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<cline> numerator.toString() + "/" + denominator.toString();</cline>
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</choice>
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</block>
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<block order="3">
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<cline>}</cline>
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</block>
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</blocks>
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</exercise>
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</section>
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<section xml:id="interfaces">

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