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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Transcribed Image Text:•• 8. Write a method that returns the sum of a given row in a two-dimensional array. Complete this code:
ArrayUtil.java
1 public class ArrayUtil
2 {
/**
Computes the sum of a given row in a two-dimensional array.
@param values the array
@param the row whose sum to compute
@return the sum of the given row
*/
public static int rowSum(int[][] values, int row)
{
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4
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}
13 }
12
RowSumTester.java
1 public class RowSumTester
2 {
public static void main(String[] args)
{
4
6.
int[][] counts =
{ 1, 0, 1 },
{ 1, 1, 0 },
{ 0, 0, 1 },
{ 1, 0, 0 },
{ 0, 1, 1 },
{ 0, 1, 1 },
{ 1, 1, 0 }
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};
int sum = ArrayUtil.rowSum(counts, 5);
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System.out.println(sum);
System.out.println("Expected: 2");
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int[][] magicSquare = {
{ 16, 3, 2, 13 },
{ 5, 10, 11, 8 },
{ 9, 6, 7, 12 },
{ 4, 15, 14, 1 },
};
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for (int row = 0; row <= 3; row++)
{
System.out.println(ArrayUtil. rowSum(magicSquare, row));
System.out.println("Expected: 34");
}
27
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30
31
32
33 }
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