How to zero specific column of 2d array

Question

Lets say I have a specific 2d array of 100x100 like so

I'm implementing an adjacency matrix and thus I want to be able to zero a specific column and line (the same column and line in this case), zeroing lines is pretty straightforward but I'm not really able to understand how I would go about for columns.

For example to zero the 2nd element of the adjacency matrix:

Answer 1

int column=1; //in your example
int row=1;//in your example


//for rows
for(int i = 0; i<numberofrows; i++)
{
  array[i][column]=0;
}

//for columns
for(int i = 0; i<numberofcolumns; i++)
{
  array[row][i]=0;
}