Consider the following code: import acm.program.*; 02 public class Average extends CommandlineProgram 03 04 { 05 private static final int SENTINEL = -1; 06 public void run() { println("This program averages numbers."); int total = 0; int count = 0; 07 08 09 10 11 int num = readInt("Enter an integer (-1 to quit): "); while (num != SENTINEL) 12 13 { total = total + num; 14 15 count++; num = readInt("Enter an integer (-1 to quit): "); } if (count != 0) 16 17 18 19 { double average = total / (double) count; printin("Average is: " + average); } 20 21 22 23 24 else { println("Goodbye!"); 25 26 27 28 29 } What is the purpose of the condition check in the if statement on line 19? O To re-prompt the user for a number if they enter -1. To compute the average of all numbers after the user has entered a value of 0. O To avoid computing any average if the user enters a value of 0. O To avoid computing any average if the user only entered-.

Consider the following code: import acm.program.*; 02 public class Average extends CommandlineProgram 03 04 { 05 private static final int SENTINEL = -1; 06 public void run() { println("This program averages numbers."); int total = 0; int count = 0; 07 08 09 10 11 int num = readInt("Enter an integer (-1 to quit): "); while (num != SENTINEL) 12 13 { total = total + num; 14 15 count++; num = readInt("Enter an integer (-1 to quit): "); } if (count != 0) 16 17 18 19 { double average = total / (double) count; printin("Average is: " + average); } 20 21 22 23 24 else { println("Goodbye!"); 25 26 27 28 29 } What is the purpose of the condition check in the if statement on line 19? O To re-prompt the user for a number if they enter -1. To compute the average of all numbers after the user has entered a value of 0. O To avoid computing any average if the user enters a value of 0. O To avoid computing any average if the user only entered-.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Hiring problem

The term "hire" means "to employ" or "to obtain services for a fee." When you hire someone, you are employing or paying them to perform a certain task for you. A step-by-step method for hiring a new employee is an efficient and successful hiring process in which a business determines its talent needs, recruits from its talent pool, and hires the best-qualified individuals. The hiring problem is a well-known decision-making problem in the analysis of algorithms. The problem is solved by designing an efficient algorithm to choose the best candidate from a list of n candidates.

Question

Consider the following code:
01
import acm.program.*;
02
public class Average extends CommandlineProgram
{
private static final int SENTINEL = -1;
03
04
05
06
07
public void run()
{
println("This program averages numbers.");
int total = 0;
08
09
10
11
int count = 0;
int num = readInt("Enter an integer (-1 to quit): ");
12
while (num != SENTINEL)
{
total - total + num;
count++;
num = readInt("Enter an integer (-1 to quit): ");
}
if (count != e)
13
14
15
16
17
18
19
{
double average = total / (double) count;
println("Average is:
}
20
21
22
+ average);
23
24
else
{
printin("Goodbye!");
}
}
25
26
27
28
29
}
What is the purpose of the condition check in the if statement on line 19 ?
To re-prompt the user for a number if they enter -1.
To compute the average of all numbers after the user has entered a value of 0.
To avoid computing any average if the user enters a value of 0.
To avoid computing any average if the user only entered -1
O000

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