有以下程序: struct Sint n;int a[20];); void f(struct S *p) int i,j,t; for (i=0; i<p->n-1; i++) for (j=i+1; j<p->n; j++) if(p->a[i]>p->a[j]) t=p->a[i]; p->a[i]=p->a[j];p->a[j]=t;) main() int i;struct S s= 10, 2,3,1,6,8,7,5,4,10,9; f(&s); for(i=0;i<s.n;i++) printf("%d,",s.a[i]); 程序运行后输出的结果是( )。
A. 1,2,3,4,5,6,7,8,9,10,
B. 10,9,8,7,6,5,4,3,2,1,
C. 2,3,1,6,8,7,5,4,10,9,
D. 10,9,8,7,6,1,2,3,4,5,