Implementing Selection and Iteration Algorithms · AP Computer Science A

AP Computer Science A Quiz

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SELECTION AND ITERATION

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You are writing a grade-processing program for a teacher. The program reads

n

integer scores (0–100) into an array and then prints each student's letter grade and the class average. Letter grades are assigned using selection: if score >= 90 then 'A', else if >= 80 then 'B', else if >= 70 then 'C', else if >= 60 then 'D', else 'F'. The program must use iteration to (1) read scores, (2) compute the sum, and (3) print results. Input format: first line

n

, second line contains

n

scores separated by spaces. Output format: one line per student in the form "score: letter", then a final line "avg: X" where X is the average as a double with one decimal. Constraints:

0 \le n \le 30

; each score is 0–100. Edge cases: if

n=0

, print only "avg: 0.0". Based on the task requirements, which condition will correctly exit the input-reading loop?

int i = 0;
// read n scores into scores[]
while (/* condition */) {
    scores[i] = in.nextInt();
    i++;
}

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