Two Equal Signs in One Line?

Question

Could someone please explain what this does and how it is legal C code? I found this line in this code: http://code.google.com/p/compression-code/downloads/list, which is a

Answer 1

It sets both variables to zero.

int i, j;
i = j = 0;

The same as writing

int i, j;
j = 0;
i = j;

or writing

int i, j;
i = 0;
j = 0;