strange scanf

[Shivanand Kadwadkar]

I was reading a forum there i found following program.

main()
{
int i, j;
scanf("%d %d"+scanf("%d %d", &i, &j));
printf("%d %d", i, j);
}

the above program is working fine.
Input:
4
5
6
output
6 5

this meas i=6 and j=5.

any idea why i=6 and j=5 ( i was thinking i should be i=5 and j=6)and
what the "+" is doing in scanf?

Thanks for sharing comments.

 

[Ben Bacarisse]

I was reading a forum there i found following program.

main()
{
int i, j;
scanf("%d %d"+scanf("%d %d", &i, &j));
printf("%d %d", i, j);
}

the above program is working fine.

The program's meaning is undefined for at least two reasons. That means
that it is bound to work fine: since the program has no defined meaning,
anything it might do is as good as anything else.

Input:
4
5
6
output
6 5

I get something else (a segmentation fault) but that's also "working
fine".

A web search suggests this is an interview question, though where
answers are offered, none are correct.

<snip>