1.9. Assessment: Pre/Post Operators

Subgoals for evaluating an assignment statement

1. Determine resultant data type of expression

2. Update variable for pre-increment or pre-decrement operators (side effect)

3. Evaluate arithmetic expression according to operator precedence

4. If an assignment statement (=), is Left Hand Side (LHS) a variable? Check data type of value against data type of variable.

5. Update variable for post-increment or post-decrement operators (side effect)

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Q1: Given the following, what value is stored in variable alpha?

int a = 0, b = 1, c = 2, d = 3, alpha;

alpha = ++a + b--

Q2: Given the following, what value is stored in variable beta?

int a = 0, b = 1, c = 2, d = 3;

int alpha, beta;

alpha = c-- * ++b;

beta = alpha - d++ + b * a;

Q3: Given the following, what value is stored in variable gamma?

int a = 0, b = 1, c = 2, d = 3;

int gamma;

gamma = ++a + ++b + c--;

Q4: Given the following, what value is stored in variable detla?

int a = 0, b = 1, c = 2, d = 3, delta;

delta = (d / c)++ - (a % ++b);

• 1.5
• 2.5
• 1
• 2
• Compiler error - will not compile

Q5: Which of the following are syntactically valid ways to increment the value of eta by one? Select all that apply.

• eta++;
• eta + 1;
• ++eta;
• ++eta--;
• eta = eta + 1;

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