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Software Programming musings

C: sizeof(array-1)

Posted 5th December 2007 at 11:44 AM by Chris

Wonder what happens when you try to take sizeof on a fixed length array with an offset? Me too!

Quote:

int foo[12];
printf("sizeof(foo): %d\n", sizeof(foo));
printf("sizeof(foo-1): %d\n", sizeof(foo-1));

Returns:

Quote:

sizeof(foo): 48
sizeof(foo-1): 4

Peculiar!

When we try:

Quote:

printf("&foo: %p\n", &foo);
printf("&(foo-1): %p\n", &(foo-1));

...

Chris

Overlord

Posted in Software

Comments 0 Chris is offline