Thread: Matrix

Ok heres my problem i need to take a matrix like these below and rotate the numbers.... How might i do this ?? i figure the code would have 4 for loops and each one would change the row and cololum of each varible.

Here is an example Matrix:
123
456
789

And this is what I want to do....
412
753
896

Code:

void Array2::rotate()
{
  int temp;

    for(int r=0; r < n; r++)
    {

      	for(int c=c-1; c<n; c++)
         {
            temp=A[r][c];
            A[r][c]=A[c][r];
            A[c][r]= temp;

         }
         	 for(int r=r+1;  r< n; r++)
            {
            temp=A[c][r];
            A[r][c]=A[c][r];
            A[r][c]=temp;
            }
            	for(int c=r; c<n; c++)
            	{
               temp=A[c][r];
            A[r][c]=A[c][r];
            A[r][c]=temp;
               }
               	 for(int r=c; r<n; r++)
                  {
                  temp=A[c][r];
            A[r][c]=A[c][r];
            A[r][c]=temp;
                  }


       }

I have another question but until i find that i can do this one I will not post it..
Any help would be appreciated....
Thanks Achilles

Code:

#include <iostream>
#include <conio.h>

using namespace std;
 
int Array[][4] = { {  1,  2,  3 },
	           {  4,  5,  6 },
                   {  7,  8,  9 } };

const int MatrixSize = 3;

void RotateArray(bool);

int main(void)
{
	for(int x = 0; x < MatrixSize; x++)
	{
		for(int y = 0; y < MatrixSize; y++)
		{
			cout<<Array[x][y]<<"\t";
		}
		cout<<endl;
	}
	cout<<endl;
	RotateArray(true);
	for(x = 0; x < MatrixSize; x++)
	{
		for(int y = 0; y < MatrixSize; y++)
		{
			cout<<Array[x][y]<<"\t";
		}
		cout<<endl;
	}
	getch();
	return 0;
}

void RotateArray(bool Clockwise)
{
	int TempSize = MatrixSize, c = 0;
	int TempArray[MatrixSize][MatrixSize] = { 0 };
	while(TempSize > 1)
	{
		for(int x = 0; x < TempSize; x++)
		{
			for(int y = 0; y < TempSize; y++)
			{
				switch (Clockwise)
				{
				case true:
					if(x == 0 && y < TempSize - 1)
					{
						TempArray[x + c][y + 1 + c] = Array[x + c][y + c];
					} else if (x == TempSize - 1 && y > 0) {
						TempArray[x + c][y - 1 + c] = Array[x + c][y + c];
					} else if (x > 0 && y == 0) {
						TempArray[x - 1 + c][y + c] = Array[x + c][y + c];
					} else if (x < TempSize - 1 && y == TempSize - 1) {
						TempArray[x + 1 + c][y + c] = Array[x + c][y + c];
					}
					break;
				case false:
					if(x == 0 && y > 0)
					{
						TempArray[x + c][y - 1 + c] = Array[x + c][y + c];
					} else if (x == TempSize - 1 && y < TempSize - 1) {
						TempArray[x + c][y + 1 + c] = Array[x + c][y + c];
					} else if (x < TempSize - 1 && y == 0) {
						TempArray[x + 1 + c][y + c] = Array[x + c][y + c];
					} else if (x > 0 && y == TempSize - 1) {
						TempArray[x - 1 + c][y + c] = Array[x + c][y + c];
					}
					break;
				}
			}
		}
		TempSize -= 2;
		c++;
	}
	if(MatrixSize % 2 == 1)
	{
		TempArray[MatrixSize / 2][MatrixSize / 2] = Array[MatrixSize / 2][MatrixSize / 2];
	}
	for(int x = 0; x < MatrixSize; x++)
	{
		for(int y = 0; y < MatrixSize; y++)
		{
			Array[x][y] = TempArray[x][y];
		}
	}
}