Comments on: 6.5 — Multidimensional Arrays

By: John

John — Wed, 04 Aug 2010 17:15:16 +0000

I will give two kinds of methods (one is similar to the author's, but a bit shorter)

#include 
#include 
using namespace std;
// 
// int main()
// {
// 	int row = 10;
// 	int column = 10;
// 	int table_array[row][column];
// 	
// 	for (int i = 1; i < row; i++)
// 	{
// 		for (int j = 1; j < column; j++)
// 		{
// 			table_array[i][j] = i*j;
// 			cout << setw(5) << table_array[i][j];
// 		}
// 		cout << endl;
// 	}
// 	return 0;
// 
// 
// }

// int main()
// {
// 	int row = 13;
// 	int column = 13;
// 	int table_array[row][column];
// 	
// 	for (int i = 1; i < row; i++)
// 	{
// 		int temp = 0;
// 		for (int j = 1; j < column; j++)
// 		{
// 			
// 			temp += i;
// 			table_array[i][j] = temp;
// 			cout << setw(4) << table_array[i][j];
// 		}
// 		cout << endl;
// 	}
// 	return 0;
// }

The first method just takes the cout into the loop as well. The second is just the stupid-way to do this problem, using additional instead.

By: akila

akila — Thu, 08 Apr 2010 07:04:25 +0000

in multidimensional array ,
one column contain a integer,
another column contain a string,
how we declare an array to accept a value

By: Cheesefriend

Cheesefriend — Sat, 02 Jan 2010 21:24:06 +0000

using a 2 dimensional array that is printed to the screen
is properly the eaisest way to make a 2d game map you
can move around on for those that is intrested in that.

made a game like that in matlab:)

By: Fluke

Fluke — Thu, 03 Dec 2009 09:53:33 +0000

If you trying to shorten the good example code, just remove the array part :)

By: DoEds

DoEds — Tue, 24 Nov 2009 10:56:04 +0000

You may also remove the if statement to shorten the code.

// Calculate a multiplication table more efficiently
    for (int nRow = 0; nRow < nNumRows; nRow++)
    {
        for (int nCol = 0; nCol < nNumCols; nCol++)
        {
            nProduct[nRow][nCol] = nRow * nCol;
            if(nCol != 0 && nRow != 0)
                cout << nProduct[nRow][nCol] << "\t";
        }
        if(nRow != 0)
        cout << endl;
    }

By: rrr

rrr — Tue, 20 Oct 2009 11:39:45 +0000

By: Kevin

Kevin — Wed, 07 Oct 2009 12:11:18 +0000

g++ compiler required double { { } } braces as follows compared to the single in the example

int nProduct[nNumRows ][nNumCols ] = { {0} };

By: detroit

detroit — Mon, 14 Sep 2009 14:22:06 +0000

is there any body to create a multiplication table using array in c++?

By: TBM

TBM — Thu, 09 Jul 2009 22:44:49 +0000

Your code wouldn't compile for me do to nCol falling out of scope in the 2nd if statement. Though this code worked fine for me.

// Calculate a multiplication table more efficiently
    for (int nRow = 0; nRow < nNumRows; nRow++)
    {
        for (int nCol = 0; nCol < nNumCols; nCol++)
        {
            nProduct[nRow][nCol] = nRow * nCol;
            if(nCol != 0 && nRow != 0)
                cout << nProduct[nRow][nCol] << "\t";
        }
        if(nRow != 0)
        cout << endl;
    }

By: FuturePixstar

FuturePixstar — Wed, 24 Jun 2009 00:26:07 +0000

i belive it’s 2.8