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Section 1.5 Expressions-WE2-P1

Subsection 1.5.1 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 1.5.2 Expressions-WE2-P1

Given
int alpha = 2, beta = 1, delta = 3, gamma;
final int eta = 10;
double omega = 2.5, theta = -1.3, kappa = 3.0, lambda, rho;

Exercises Exercises

1.
    Q11: gamma = beta + theta;
  • valid
  • invalid
2.
    Q12: eta = 42;
  • valid
  • invalid
3.
    Q13: rho = delta;
  • valid
  • invalid
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