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Trouble with a two dimensional array - one element replaceing another

I have been trying to write a simple program of connect4 using a 4x4 array. It certiantly sounds simple but for some reason I am having problems with the array itself

#include <iostream>
using namespace std;

void main()
{
      int grid[3][3];
      for(int m=0;m<4;m++)
      {
            for(int n=0;n<4;n++)
            {
                  grid[m][n]=0;
            }
      }
      cout<<grid[0][0]<<" "<<grid[0][1]<<" "<<grid[0][2]<<" "<<grid[0][3]<<endl;
      cout<<grid[1][0]<<" "<<grid[1][1]<<" "<<grid[1][2]<<" "<<grid[1][3]<<endl;
      cout<<grid[2][0]<<" "<<grid[2][1]<<" "<<grid[2][2]<<" "<<grid[2][3]<<endl;
      cout<<grid[3][0]<<" "<<grid[3][1]<<" "<<grid[3][2]<<" "<<grid[3][3]<<endl;
      cout<<endl;
      grid[1][0]=1;
      grid[2][3]=1;
      cout<<grid[1][0]<<" "<<grid[0][3]<<" "<<grid[2][3]<<" "<<grid[3][0]<<endl;
      grid[0][3]=2;
      grid[3][0]=2;
      cout<<grid[1][0]<<" "<<grid[0][3]<<" "<<grid[2][3]<<" "<<grid[3][0]<<endl;
}

After a significant amount of frusteration I scrapped the entire code and tried this code. The only problem is, after they are all initalized to 0, it prints out the grid perfectly. When I go to assign values however, any value I put in grid[1][0] ends up in grid[0][3] and vice versa. Also anything in grid[2][3] ends up in grid[3][0]. My Dev enviroment is Microsoft Visual C++, I installed it on my other computer just to make sure it wasn't a memory problem, but got the exact same result.

This is my first question here so I am still a bit fuzzy on how this works.

avizit

int x[10];
means you have 10 integers x[0] to x[9];

similarly for int grid[3][3];

grid[3][3] is out of bounds.

/abhijit/

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avizit

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SpaceMonkey101

ASKER

Wow, thank you... I knew it was something stupid... heh

rendaduiyan

the arry declared is int grid[3][3]
and initialized with 4x4, which is Array boudary write(ABR/ABW).
that is the reason you print such result.