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Section 1.2 Expressions-WE1-P1

Subsection 1.2.1 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)
For all given problems below indicate if the code is valid or invalid. Each problem is independent of the others (e.g. Question 2 does not depend on Question 1, only the “Given” code).

Subsection 1.2.2 Expressions-WE1-P1

Given
int alpha, beta = 1, gamma;
double omega = 2.5, theta, lambda;

Exercises Exercises

1.
    Q1: alpha = beta;
  • valid
  • invalid
2.
    Q2: alpha = omega;
  • valid
  • invalid
3.
    Q3: theta = 22;
  • valid
  • invalid
4.
    Q4: omega = gamma;
  • valid
  • invalid
5.
    Q5: theta = lambda;
  • valid
  • invalid
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