int a = 0;

a = ( a*3 , a + 5, a - 4, a=6 );

// and a turns out to be 6.

a = ( a*3 , a += 5, a - 4, a+6 );

// and a turns out to be 11


/* Does anybody know what is this assignment thing called or under what resource can I find more about this?

*/