#include <stdio.h>
int main() {
int y=0;
int arr[6]= {1, 2, 3, 4, 5, 6};
int * ptr = &arr[0];
int * ptr2 = &arr[5];
for(int i=0; i<3; i++)
{
y = *ptr;
*ptr = *ptr2;
*ptr2 = y;
ptr ++;
ptr2 --;
}
for(int i=0; i<6; i++)
{
printf("%d ", arr[i]);
}
return 0;
}
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