Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Translate the pseudocode in Section 2.4 for computing the number of tiles and the gap width into Java.

number of pairs = integer part of (total width - tile width) / (2 x tile width)number of tiles = 1 + 2 x number of pairsgap at each end = (total width - number of tiles x tile width) / 2

 

I'm wondering why this test failed, during another test, it was good because the gap was 1.00. Is there something I should do in terms of rounding?

... 7. Translate the pseudocode in Section 2.4 for computing the number of tiles and the gap width into Java.
number of pairs
number of tiles = | + 2 x number of pairs
integer part of (total width - tile width) / (2 x tile width)
gap at each end
= (total width - number of tiles x tile width) / 2
Tiles.java
1 import java.util.Scanner;
3 public class Tiles
4 {
5
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
System.out.print("Total width: ");
int totalWidth = in.nextInt ();
System.out.print ("Tile width: ");
int tileWidth = in.nextInt();
int pairs = (totalWidth - tilewidth) /(2 * tileWidth);
int tiles= 1 + (2 * pairs);
double gap = (totalWidth - (tiles * tileWidth))/2;
System.out.printf("Pairs: %d%nTiles: %d%nGap:
}
7
10
11
12
13
14
15
16
%.2f%n", pairs, tiles, gap);
17 }
CodeCheck
Reset
Testing Tiles.java
Test 1
Actual output
Expected output
Total width: Tile width: Pairs: 9 Total width: Tile width: Pairs: 9
Tiles: 19
Tiles: 19
Gap:
2.00
Gap:
2.50
expand button
Transcribed Image Text:... 7. Translate the pseudocode in Section 2.4 for computing the number of tiles and the gap width into Java. number of pairs number of tiles = | + 2 x number of pairs integer part of (total width - tile width) / (2 x tile width) gap at each end = (total width - number of tiles x tile width) / 2 Tiles.java 1 import java.util.Scanner; 3 public class Tiles 4 { 5 public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print("Total width: "); int totalWidth = in.nextInt (); System.out.print ("Tile width: "); int tileWidth = in.nextInt(); int pairs = (totalWidth - tilewidth) /(2 * tileWidth); int tiles= 1 + (2 * pairs); double gap = (totalWidth - (tiles * tileWidth))/2; System.out.printf("Pairs: %d%nTiles: %d%nGap: } 7 10 11 12 13 14 15 16 %.2f%n", pairs, tiles, gap); 17 } CodeCheck Reset Testing Tiles.java Test 1 Actual output Expected output Total width: Tile width: Pairs: 9 Total width: Tile width: Pairs: 9 Tiles: 19 Tiles: 19 Gap: 2.00 Gap: 2.50
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