#include<stdio.h>
int main() {
int *p=NULL;
if (p == NULL) {
printf("%x",*p );
}
return 0;
}
If I can, How? If I can't, What value in it?
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Jeungwoo Park
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3Mainly It depends on your platform.... – LPs Sep 23 '16 at 15:27
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it'd have the value of whatever null is on your platform. null should be treated as "undefined"/"unknown", therefore what you're trying to do makes very little sense. – Marc B Sep 23 '16 at 15:28
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One a microcontroller or on some other simple microprocessor you may be able to read that value. – Jabberwocky Sep 23 '16 at 15:30
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...and usually is IPC (Initial Program Counter) – LPs Sep 23 '16 at 15:32
1 Answers
2
No, you cannot in general dereference a NULL pointer, that gives undefined behavior.
That's sort of the point, so this idea is a bit strange.
Note that this doesn't mean that your code won't run on any platform or produce a result, but it still violates the language specification so the result from running it on some particular implementation doesn't matter.
unwind
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