programming in C

Question

What is the output of following program?
#include <stdio.h>
void main(){
int p = -8;
int i = (p++, ++p);
printf("%d\n", i);
}

Can anyone explain?

Comments

how to identify when comma is ued as a separator or a sequence point?@sakharam

@Shaik Masthan

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@himgta

Check this

https://www.geeksforgeeks.org/comna-in-c-and-c/

https://www.geeksforgeeks.org/a-comma-operator-question/

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@himgta

Along with what Shaik Masthan said you may read this too: http://c-faq.com/expr/seqpoints.html

Answer 1

Here Output will be -6

as p = -8

and i = (p++,++p)    //comma is used as separator

let k = p++ => k = p and p= p+1

that means k = -8 and  p = -7

and lel l = ++p => p = p+1 and l = p

that means l = -6 and p = -6

as comma operator evaluates left to right that why first p++ then ++p will be resolved

so i = -6