void fun(int *a,int *b) { int *c; c=a;a=b;b=c; } main() { in

void fun(int *a,int *b) { int *c; c=a;a=b;b=c; } main() { int x=3,y=5,*p=&x,*q=&y; fun(p,q);...
void fun(int *a,int *b)
{
int *c;
c=a;a=b;b=c;
}
main()
{
int x=3,y=5,*p=&x,*q=&y;
fun(p,q); printf("%d,%d,",*p,*q);
fun(&x,&y); prin"%d,%dn",*p,*q);
}
两次调用明明传递的是地址,为什么不能交换x,y的值