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Section 1.12 Expressions-WE4-P2
Subgoals for evaluating an assignment statement.
Determine resultant data type of expression
Update variable for pre operators based on side effect
Solve arithmetic equation, operator precedence
If = statement, is Left Hand Side (LHS) a variable? Check data type of copied value against data type of variable
Update variable for post operators based on side effect
Subsection 1.12.1
Given
int alpha = 2, beta = 1, delta = 3, eta, gamma;
double omega = 2.5, theta = -1.3, kappa = 3.0, lambda, rho;
Exercises Exercises
1.
Q27: lambda = alpha / kappa + delta;
What is the value of lambda? Round to 4 decimal points.
2.
Q28: eta = alpha * beta + (omega – theta) * kappa;
Why is this statement invalid?
cannot assign a double to an int variable
eta does not have a value
eta is a constant
cannot assign an int to a double variable
Given
int r = 8;
double volume;
3.
Q29: Which statement will calculate the volume of a sphere most accurately?
volume = 4 / 3 * 3.14 * r * r * r;
volume = 4 / 3 * 3.14159 * r * r * r;
volume = 4.0 / 3 * 3.14 * r * r * r;
An accurate result is not possible with these data types.
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