Arizona State University (ASU) CSE100 Principles of Programming with C++ Midterm 1 Practice Exam

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What does the C++ expression "6 - 6 / 3 + 3" evaluate to?

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To evaluate the C++ expression "6 - 6 / 3 + 3," it's important to follow the rules of operator precedence, which dictate the order in which operations are performed.

1. **Division first:** According to the precedence rules, division is performed before addition and subtraction. In this case, you perform the operation "6 / 3" first, which evaluates to 2.

2. **Substitution of the result:** After performing the division, substitute the result back into the expression. This changes the expression to "6 - 2 + 3."

3. **Order of operations:** Next, evaluate the expression from left to right since subtraction and addition are of equal precedence.

- First, calculate "6 - 2," which results in 4.

- Then add 3 to the result: "4 + 3" equals 7.

Thus, the final result of the expression "6 - 6 / 3 + 3" evaluates to 7. This process illustrates the importance of understanding operator precedence and how it affects the evaluation of expressions in C++.

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