If the input sets int x with 5 and int y with 7, what is the ending value of z? z is declared as a boolean.

z = (x y);

Question

If the input sets int x with 5 and int y with 7, what is the ending value of z? z is declared as a boolean.

z = (x > y);

BlackTom AI · Accepted Answer

A comparison expression x > y evaluates to true only when the numeric value of x is strictly greater than y; otherwise it evaluates to false.

1. Relevant knowledge points and concepts
- Relational operator ">": compares two numbers and yields a boolean result (true or false).
- Boolean variable assignment: z declared as boolean will store the boolean result of the comparison.
- Given values: x = 5 and y = 7.

2. Step-by-step reasoning
Step 1: Identify the numeric values: x = 5, y = 7.
Step 2: Evaluate the relational expression x > y, i.e., 5 > 7.
Step 3: Determine truth value of the comparison: 5 is not greater than 7, so the comparison is false.
Step 4: Assign that boolean result to z: z = false.

3. Intermediate calculation steps
- Compare the magnitudes: 5 > 7?
- Since 5 < 7, the relational test fails.
- Result of 5 > 7 is false.
- Therefore z receives the value false.

4. Why the correct answer is correct
Because the relational operator directly produces a boolean value based on the numeric comparison, and since 5 is less than 7, the expression evaluates to false. Assigning this result to z yields z = false.

5. Why the other options are incorrect
- "Error: No value assigned to z due to a syntax error": There is no syntax error in z = (x > y); — it is valid syntax in common languages.
- "Error: No value assigned to z due to a runtime error": No runtime error occurs from this simple comparison and assignment.
- "True": This would be correct only if x were greater than y; here x (5) is not greater than y (7), so True is incorrect.

6. Conclusion
The expression z = (x > y) with x = 5 and y = 7 evaluates to false. This confirms the provided answer: False.

If the input sets int x with 5 and int y with 7, what is the ending value of z? z is declared as a boolean. z = (x > y);单项选择题

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