Union u{ union u { int i; int j; }a[10]; int b[10];}u;main(){ printf("n%d", sizeof(u)); printf(" %d", sizeof(u.a));// printf("%d", sizeof(u.a[4].i));}

A) None of the Above
B) 1, 100, 1
C) 40, 4, 4
D) 4, 4, 4
Explanation: 20, 200, error for 3rd printf

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Dec 10th, 2005
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Showing Answers 1 - 9 of 9 Answers

Amit

Dec 14th, 2005

20,20,2

wlochaty

Jan 19th, 2006

it depends on implementation.sizeof(int)= 4 rather than 2 so this might be:40 40 4 which also is A)None of Above.

sksuresh
Profile Answers by sksuresh

Sep 8th, 2006

Only two Printf are there, the thirdone is commented. So the answer is
(A)None of the these.

dasam
Profile Answers by dasam

Mar 30th, 2007

40, 4, 4

abhimanipal
Profile Answers by abhimanipal

Jan 24th, 2010

If I uncomment the third printf I get the following error

pollux {~} > gcc test.c -o test
test.c: In function `main':
test.c:21: error: union has no member named `i'
pollux {~} >

This is on linux machine with gcc compiler. Can anyone explain the reason for this ?