How to find first zero element per row in a matrix and set other elements to zero without loops

Hi. I have a matrix of this form:

A = [ 1 2 3 0 4 5 0 0 1 1 1; 2 5 0 0 0 1 1 0 4 2 3; 4 5 2 3 0 1 2 3 4 5 6];

and i want for each line, starting from the first zero to get this type of matrix

B = [ 1 2 3 0 0 0 0 0 0 0 0; 2 5 0 0 0 0 0 0 0 0 0; 4 5 2 3 0 0 0 0 0 0 0];

I managed to get the index of each column where the first zero can be found, ie [4 3 5] but I cannot get the B matrix. Help will be greatly appreciated. Thanks!

Answer 1

[Adam]

B = A;
B( cumprod(A,2) == 0 ) = 0;

[Franck]

Thanks! It works great.

Answer 2

[Andrei Bobrov]

B = A.*(cumsum(A==0,2)==0);