#include <stdio.h>
#include <conio.h>
int main(){
    int a[] = { 3,8,7,2,6,9,11};
    int *p = a;
    int *q = p+6;
    while(p<q){
               int temp = *p;
               *p=*q;
               *q=temp;
               p++;
               q--;
    }
    for(int i =0 ;i<7;i++){
            printf("%d\n",a[i]);        
    }
    getch();
}