Getting different output from different C compilers

Question

If I'm getting different outputs on different compilers while running the below program:

#include <stdio.h>
void main()
{
  struct s
  {
    int a;
    char b;
  } s1, s2;

  int x = sizeof(s1);
  printf("%d", x);
}

OUTPUT (Turbo c):

(int 2 + char 1 = 3)

I am getting 3 here.

OUTPUT (Code blocks):

Why is 8 is output here?

there are lot of answers reagrding `sizeof(struct)` which considers padding so it is implementation defined — Gopi, Sep 01 '15 at 08:49
@Prakash: maybe the 8 comes from 1 (char) plus 4 (int) rounded to the nearest 8. — halfer, Sep 13 '15 at 15:57

score 0 · Answer 1 · answered Sep 01 '15 at 08:49

0

The size of C standard types (except char and its variants which are 1) is implementation dependent as is the padding amount between structure members.

answered Sep 01 '15 at 08:49

ouah

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Please give me elobrate answer. – Prakash Bala Sep 01 '15 at 09:05

Getting different output from different C compilers

1 Answers1