[code="java"]void swap(int *p1, int *p2)
{
int *p;
p= p1;
p1= p2;
p2 = p;
}
void main()
{
int x=10,y=100;
int *px=x,*py=y;
printf("%d,%d",*px,*py);
swap(px,py);
printf("%d,%d",*px,*py);
}
[/code]