check characterin 2D array

This is a discussion on check characterin 2D array within the C++ Programming forums, part of the General Programming Boards category; Hi how can I check for certain character in rows or columns of 2-D array ? for example , if ...

  1. #1
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    Angry check characterin 2D array

    Hi
    how can I check for certain character in rows or columns of 2-D array ?
    for example , if array is :
    Code:
    int main()
    {
        int i,j;
    	
    	char board[3][3]={{'X','X','O'},
    					  {' ','X','O'},
    					  {' ','O','O'}};
    	for(i=0; i<3; i++)
    	{
    		for(j=0; j<3; j++)
    			cout<<board[i][j]<<"\t";
    	cout<<endl;
    	}
    }
    how can I check that if X is used in whole row, return 1.

    Thanks

  2. #2
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    Code:
    if(board[1] == "XXX") return 1;

  3. #3
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  4. #4
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    Quote Originally Posted by eros View Post
    Code:
    if(board[1] == "XXX") return 1;
    don't think that will work since "XXX" is a string literal.

    how can I check for certain character in rows or columns of 2-D array ?
    you have to iterate over each row of the 2d array to check.

    Code:
    int win; 
    for ( int i = 0 ; i < 3 ; ++i)
    {
       for( int j = 0 ; j < 3; ++ j)
            {
                if( board[i] == 'somechar')
                   win++;
             }
      if ( win = 3) return 1; 
    }
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  5. #5
    Registered User bobknows's Avatar
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    here is one way to test for diagonals
    Code:
    if(board[0][0] == 'X' && board[1][1] == 'X' && board[2][2] == 'X')
         return 1;
    but i think there is a better way.

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