Count size of matrix without size function in matlab

[hsong9]

I need to keep track of the size of the matrix myself.
This means I can't use "size" function.
Is it possible?
For example,

A is a 5 x 5 matrix. I need to create a vector x=[0,0,0,0,0].
It should be just
x = zeros(size(A,1),1); %or length(A)

but I need to check the size of A matrix without size function.

Could anyone give me hints?

Thank you

 

[caffenta]

Wouldn't A(1, :)*0 or A(:, 1)*0 work?

 

[AIR&SPACE]

INPUT
A= zeros(5,6) % Just as an Example
Cols=length(A) % Returns # of columns in A

OUTPUT
A= [0 0 0 0 0 0; 0 0 0 0 0 0; 0 0 0 0 0 0; 0 0 0 0 0 0; 0 0 0 0 0 0]
Cols=6

does that help?