c语言5-5 在应用对象式宏的数组中对数组元素进行倒序排列

#include <stdio.h>

#define NUMBER 9

int main(void)
{
    int i, a[NUMBER];
    puts("please input the elements.");
    
    for(i = 0; i < NUMBER; i++)
    {
        printf("NO.%d = ", i + 1); scanf("%d", &a[i]);
    }
    
    puts("===reversed result===");
    for(i = 0; i < NUMBER / 2; i++)
    {
        int tmp = a[i];
        a[i] = a[NUMBER - 1 -i];
        a[NUMBER - 1 -i] = tmp;
    }
    for(i = 0; i < NUMBER; i++)
    {
        printf("a[%d] = %d\n", i, a[i]);
    }
    return 0;
}