Suppose sum and num are int variables, and the input is 20 25 10 18 -1 What is the output of the following code? (Assume that console is a Scanner object initialized to the standard input device.) sum = 0; num = console.nextInt(); while (num != -1) {if (num = 20) sum = sum + num; else sum = sum - num; num = console.nextInt();} System.out.println(sum);
A) 17
B) 28
C) 45
D) 60

Question

Suppose sum and num are int variables, and the input is 20 25 10 18 -1 What is the output of the following code? (Assume that console is a Scanner object initialized to the standard input device.) sum = 0; num = console.nextInt(); while (num != -1) {if (num >= 20) sum = sum + num; else sum = sum - num; num = console.nextInt();} System.out.println(sum);
A) 17
B) 28
C) 45
D) 60

Quizplus · Accepted Answer

The code reads a sequence of integers and adds the integers greater than or equal to 20 to the sum, and subtracts the integers less than 20 from the sum. The input is 20 25 10 18 -1. The first integer is 20, which is greater than or equal to 20, so it is added to the sum. The second integer is 25, which is greater than or equal to 20, so it is added to the sum. The third integer is 10, which is less than 20, so it is subtracted from the sum. The fourth integer is 18, which is greater than or equal to 20, so it is added to the sum. The fifth integer is -1, which is the sentinel value, so the loop terminates. The sum is 17, so the output is 17.

Suppose Sum and Num Are Int Variables, and the Input