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Which of the following code segments can be used to update the values of the variables as shown in the table?
A
temp ← word1
word3 ← word1
word1 ← temp
B
temp ← word1
word1 ← word3
word3 ← temp
C
temp ← word1
word1 ← word2
word2 ← temp
D
word1 ← word2
word2 ← word3
word3 ← word1
To determine which code segment can update the variables as shown in the table, we need to analyze what each segment does:
1. A swaps `word1` and `word3`, but does not involve `word2`.
2. B swaps `word1` and `word3`, affecting `word1` and `word3`.
3. C swaps `word1` and `word2`, but does not involve `word3`.
4. D moves values in a chain but ends up overwriting `word1` with `word2`, which does not represent a swap.
Assuming the intention is to have a specific updated value for all three words, B is the segment that allows for a proper exchange.
Answer: B – It swaps the values of `word1` and `word3`, while leaving `word2` unaffected. This ensures that all variables can correctly update as per the table’s requirements. However, without knowing the specific values or the table layout, this is a logical conclusion based on standard swapping principles.
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