Section 6.1 Review: Integer Division
Recall the funny division behavior we notice in the C programming language when using integers. Feel free to play around in this code window to refresh your memory and experiment in order to analyze this behavior.
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1.
Here is a quick review question: Using integer arithmetic, what is the result of 15/4?
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3
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Correct!
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4
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Not quite - try again!
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3.75
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Not quite - try again!
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0.75
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Not quite - try again!
Hint.
In an integer division only the integer part of the result is accounted for.
2.
Another quick review question: In the C programming language, what is the result of 19/2.0?
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9.5
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Correct!
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9
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Not quite - try again!
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10
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Not quite - try again!
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9R1
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Not quite - try again!
Hint.
By writing 2.0 instead of 2 in the computation, the data type in which the operation is performed is automatically cast to a floating point which means that the result can also be a floating point number.
3.
And another review question: Suppose that a and b are variables of type
int, a has the value 8, b has the value 6. In the C programming language, what is the value of
(a+b)/3?
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4
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Correct!
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5
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Not quite - try again!
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4.6
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Not quite - try again!
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4.67
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Not quite - try again!
Hint.
Because of the data types of a and b, an integer division is performed here.
