How to move array element

Anyone can help?

I have two matrix A and B with the same size. How do I move the elements of matrix A (only with the value ==1) to matrix B. A = [1 1 0 0 ;1 1 1 0 ;0 0 0 0 ;0 0 0 0]

B = [0 0 0 0 ;0 1 1 0 ;0 1 1 1 ;0 1 0 0]

And this the matrix should be: C = [1 1 0 0 ;1 1 1 0 ;0 1 1 1 ;0 1 0 0]

Answer 1

[KSSV]

A = [1 1 0 0 ;1 1 1 0 ;0 0 0 0 ;0 0 0 0] ; 
B = [0 0 0 0 ;0 1 1 0 ;0 1 1 1 ;0 1 0 0] ; 
C = [1 1 0 0 ;1 1 1 0 ;0 1 1 1 ;0 1 0 0] 

C = 4×4

1 1 0 0 1 1 1 0 0 1 1 1 0 1 0 0

iwant = B ;
iwant(A==1) = A(A==1) 

iwant = 4×4

1 1 0 0 1 1 1 0 0 1 1 1 0 1 0 0

isequal(C,iwant)

ans = logical
   1