896 views

Which combination of the integer variables $x, y$ and $z$ makes the variable $a$ get the value $4$ in the following expression?

$$a=(x > y)?((x > z) ?x:z): ((y > z) ?y:z)$$

1. $x=3, y=4, z=2$
2. $x=6, y=5, z=3$
3. $x=6, y=3, z=5$
4. $x=5, y=4, z=5$

Note:   " ?  : " operator associativity is Right to Left.
Only Assignment, Unary &  ?:  operator are right to left.
Rest all are left to right.
http://www.difranco.net/compsci/C_Operator_Precedence_Table.htm

( ) has highest precedence

in above ques , ( ) comes into picture so associativity of ? : not counted
Yes,  here due to bracket, we need not care about the associativity of   ? :   But when there are multiple ?:  & no bracket is there then we should follow right to left.
Option B and C could be rejected directly because non of the variable X, Y or Z has value 4.

Using option A : x=3, y=4, z=2

a=(3>4)? No

therefore don't evaluate the first part and check second part ((y>z)?y:z)

(4>2)? Yes

a= value of y =4

Answer is (A) x=3, y=4, z=2

selected by
Given expression finds maximum among x,y and z and assigns it to a.
Yes it is finding maximum between X,Y and Z and assign it to "A"..
Yes , correct @sachin