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Start your free trialStephen McClure
14,780 PointsReturn a multiplication table consisting of an array of arrays. The table should contain all of the products of integers
This challenge question doesn't help me much for what's expected to solve this one. My code gives no compiler errors when I check it but I get the error: Bummer: Object reference...https://teamtreehouse.com/library/c-collections/arrays/jagged-arrays#preview
namespace Treehouse.CodeChallenges
{
public static class MathHelpers
{
public static int[][] BuildMultiplicationTable(int maxFactor)
{
int[][] table = new int[maxFactor][];
for(int indexX = 0; indexX <= maxFactor; indexX++)
{
for(int indexY = 0; indexY <= maxFactor; indexY++)
{
table[indexX][indexY] = indexX * indexY;
}
}
return table;
}
}
}
2 Answers
Steven Parker
231,198 PointsYou're close, but:
- the outer loop should create the inner array for the column and assign it to the table
- the arrays need to be sized larger than maxFactor (since the indexes start with 0)
Stephen McClure
14,780 PointsYeah I finally got it to work thanks. It stumped me for a while, but I just needed to take a break and then got it to work.