初学指针（输入两个整数，由大到小输出）

#include <iostream>
using namespace std;

int main()
{
    void Swap(int *p1, int *p2);
    int a, b; 

    cout<<"please enter a and b"<<endl;
    cin>>a>>b;

    int *pointer_1 = &a, *pointer_2 = &b; 
    //pointer_1和pointer_2分别指向a和b的内存空间

    if(a < b)
     {	 
       Swap(pointer_1,pointer_2);
     }

    cout << a << b << endl;

    return 0;
}

void Swap(int *p1,int *p2)
{
     int tmp = *p1;
     *p1 = *p2;
     *p2 = tmp;
}