CSE 142 Lecture 19: Arrays

54 views4 pages

Verified Note

emeraldcrow580

13 Nov 2018

School

Department

Computer Science and Engineering

Course

CSE 142

Professor

Brett Wortzman

For unlimited access to Class Notes, a Class+ subscription is required.

CSE 142 verified notes

19/30View all

CSE 142 Lecture 17: Line-Based File input output files

CSE 142 Lecture 19: Arrays

CSE 142 Lecture 20: Arrays as parameters/return values, Array traversal, & Array tallying

Document Summary

1 // this short program calculates the average temperature for a sequence. 2 // of days and reports how many days were above average. 4 // note the use of an array to store the temperatures, even though we. 5 // don"t know how many days there will be before the program runs. 6 // we would not have been able to write this program without arrays. 10 public static void main(string[] args) { 18 for ( int i = 0; i < temps. length; i++) { 27 for ( int i = 0; i < temps. length; i++) { 34 system. out. println( "there were " + numaboveavg + " days above average. Arr[5] java. lang. arrayindexoutofboundsexception: array index (5) is greater than or equal to array. // notice that the length does not have parentheses and it works! // yes, this is just one of those java notes to know, when taking length of arrays, no parentheses.

Related Questions

4. In this question, you will be shown a snippet of code. You will then be shown the output from either the compiler or the Java virtual machine and be asked what the error is and how to fix it. In each case, your answer should include the line number of the problem, a one or two sentence explanation as to why the issue occurs, and a specific fix for the problem. Your fix should mention the exact line or lines of code you'd add/change/delete. Total for this question (5 parts): (15 points) (a) Consider the following class: import java.util.Scanner; public class Hockeystandings //This method should calculate the percentage of games in which the team lost. public static double computePercentageLosses (int numwins, int numLosses) return numLosses/ (numwins + numLosses) * 100; public static void main(String[] args) { Scanner reader - new Scanner (System.in); System.out.println("Enter the number of wins for the Maple Leafs"); int numLeafwins = reader.nextInt (); System.out.println("Enter the number of losses for the Maple Leafs"); int numLeaflosses-reader.nextInt (); System.out.println("Enter the number of wins for the Canadiens"); int numCanadienswins – reader.nextInt (); System.out.println("Enter the number of losses for the Canadiens"); int numCanadienslosses = reader.nextInt (); double mapleLeafs Record - computePercentage Losses (numLeafwins, numLeaf Losses); double canadienskecord - computePercentage Losses (numCanadienswins, nuCanadienslos305): if (canadiens Record > mapleleafsRecord) { System.out.println("Of course the Leafs did worse."); else { System.out.println("Wow, that hasn't happened for a long time!"); The point of the program is to ask the user to enter numbers representing the wins and losses of the Maple Leafs and Canadiens in a season. The code compiles successfully and when you run the program, you enter the values: 2 80 40 42 into the keyboard. You expect that the program will output the message Of course the Leafs did worse since they had fewer wins. However, to your surprise, the output of the program is: Wow, that hasn't happened for a long time! Why is this the case and fix the error?

CSE 142 Lecture 19: Arrays

CSE 142 Lecture 17: Line-Based File input output files

CSE 142 Lecture 19: Arrays

CSE 142 Lecture 20: Arrays as parameters/return values, Array traversal, & Array tallying

Document Summary

Get access

Related Documents

CSE 142 Lecture 11: Information Systems

CSE 142 Lecture 20: Arrays as parameters/return values, Array traversal, & Array tallying

CSE 142 Lecture 13: Random

Related Questions