Self doubt - Programming closed

Question

X=2;

Y=++x * ++x * ++x ;

Printf("%d",Y);

In the above question, we have to use the final value of x or it will be evaluated seperately and then multiplied.

Ex: Y= 3*4*5; or Y=5*5*5;

Comments

it is compiler dependent we cant assume the associativity in terms of increment nd decrement

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Okay.

Suppose it is a NAT, then what should be the answer.

Or it is inside a program and for getting the output of the program value of Y is required then what must be the answer?

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NOTHING LIKE THIS WILL BE IN GATE AS FAR AS I KNOW

Answer 1

Since pre increment and pre decrement have right associativity. Pre increment and decrement operator have more precedence than multiplication operator.

Therefore ,

In Y=(++x)*(++x)*(++x), evaluation is done as follows:

Comments

Evaluation order is separate from the associativity order. Associativity only specifies the operands for the operators and when and how the operands are evaluated is independent of it. 

https://gateoverflow.in/62411/undefined-behaviour-in-c

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Thanks @Arjun sir. I understood the concept.