swap(int *p1,int *p2)
{int *temp;
*temp=*p1;
*p1=*p2;
*p2=*temp;
}
main()
{int a,b;
int *pointer_1,*pointer_2;
scanf("%d,%d",&a,&b);
pointer_1=&a;pointer_2=&b;
if(a<b)swap(pointer_1,pointer_2);
printf("\na=%d,b=%d\n",a,b);
}
为什么运行结果a=9,b=9
"形参值改变无法传给实参"是什么意思