有以下程序void f(int *x,int *y){int t;t=*x;*x=*y;*y=t;}int main(){int a[8]={1,2,3,4,4,6,7,8},i,*p,*q;p=a;q=&a[7];while(*p!=*q){f(p,q);p++;q--;}for(i=0;i<8;i++) printf("%d,",a[i]);return 0;}程序运行后的输出结果是( )。
A. 8,2,3,4,4,6,7,1,
B. 4,6,7,8,1,2,3,4,
C. 1,2,3,4,4,6,7,8,
D. 8,7,6,4,4,3,2,1,