C语言逆序排列一维数组

#include <stdio.h>
#define N 9
int getnum(void);

int main(void)
{
	int num[N];
	int i = 0;
	int temp;
	printf("请输入 %d 个数字: \n",N);
	do
	{
		printf("第 %d 个数： ",i+1);
		num[i] = getnum();
		i++;
	}while (i < N);
	printf("您输入的数组为：\n");
	for (i=0;i<N ;i++ )
	    printf("%d\t",num[i]);
    for (i = 0;i < N / 2 ;i++ )
    {
        temp = num[i];
        num[i] = num[N-i-1];
        num[N-i-1] = temp;
    }
	printf("逆序排列为：\n");
	for (i=0;i<N ;i++ )
	    printf("%d\t",num[i]);
	return 0;

}
int getnum(void)
{
    int num;
    char ch;
    while (scanf("%d",&num) != 1)
    {
	    while ((ch = getchar()) != '\n')
	        putchar(ch);
	    printf(" 不是正确的输入.\n");
	    printf("请输入一个整数: ");
    }
    while ((getchar()) != '\n')
	    continue;
    return num;
}