What is the value of c under Linux 64-bits platform?

Question

The following code:https://code.sololearn.com/c2Ce84AhQ3hq/?ref=app

I think that the value of c is 2+3=5. Unfortunately it doesn't follow my thinking. So I ask the social media say it evaluation is "2+3*4(because int is 4 bits)". That doesn't make any sense to me. How did that works??

Answer 1

The key to the problem is that #define is not a function, so you'll not get:

ptr=(int*)(long)(a+b);

But:

ptr=(int*)(long)a+b;

That means ptr=(address)long2 + 3 (pointer arithmetic)

Answer 2

RainStorm an extra set of parentheses will do the trick.

Answer 3

https://code.sololearn.com/cr8FC7bja075/?ref=app