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Possible Duplicate:
Why do these two pointer subtractions give different results?
char arr[] = "stackoverflow";
char *p1 = arr;
char *p2 = arr + 3;
printf("%d", (int*)p2 - (int*)p1);
it’s answer is 0..Can you explain why is it so ?
Because
p2 - p1is< sizeof (int). So(int *) p2 - (int *) p1 == 0, the number ofintelements between the two pointers.