input data into 2d char array

Not sure what your goal is, but perhaps something like this:

int i;
char str[100][100];
for (i=0;i<100;i++)
{
  for(int j=0; j<100; j++)
  {
    cin >> str[i][j];
  }
}

Note, that's just untested pseudocode. But note how I've used 2 indices there.

[Update]
--------

His alternate thread where he described it with more details (the key point about strings vs chars) has been answered here:

list of strings in an 2d array[^]