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Authors:
Walter Savitch ,julia Lobur
Chapter:
More Flow Of Control
Exercise:
Self-test Exercises
Question:4 | ISBN:9780321531346 | Edition: 7

Question

Does the following sequence produce division by zero?

j = −1;

If ((j > 0) && (1/(j+1) > 10))

cout << i << endl;



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Answer

The Boolean expression j > 0 is false (j was just assigned -1).

  • The && uses short-circuit evaluation, which does not evaluate the second expression if the truth value can be determined from the first expression.

  • The first expression is false, so the entire expression evaluates to false without evaluating the second expression. So, there is no division by zero.



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