Difficulty: Easy
Correct Answer: The program will print the output Wel.
Explanation:
Introduction / Context:
This checks basic index arithmetic and loop control for printing a slice of a C-string using a 1-based starting position and a count of characters.
Given Data / Assumptions:
"Welcome!".x = 1 (1-based start index).y = 3 (number of characters to print).i = x - 1 and decrements y each iteration.
Concept / Approach:
Since C arrays are 0-indexed, using i = x - 1 points to the intended start character. The loop prints exactly y characters from that position.
Step-by-Step Solution:
Compute start index: i = 1 - 1 = 0 ⇒ s[0] = 'W'.First iteration prints W, y becomes 2.Second iteration prints e, y becomes 1.Third iteration prints l, y becomes 0 and loop ends.Combined output is Wel.
Verification / Alternative check:
Try x=4, y=3 to see com, confirming the indexing logic.
Why Other Options Are Wrong:me! and !em are reversed slices; Welcome! prints the entire string, not a 3-character prefix; no compile error occurs.
Common Pitfalls:
Off-by-one errors when converting from 1-based to 0-based indices; forgetting to bound the loop can cause overruns (not the case here).
Final Answer:
The program will print the output Wel.
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