指针作业1

#include <iostream>
using namespace std;
int main()
{
 void exchange(int*p1,int*p2);
 int a,b;
 int*p1,*p2;
 cin>>a>>b;
 p1=&a;
 p2=&b;
 exchange(p1,p2);
 cout<<*p1<<" "<<*p2<<endl;
 return 0;
}
void exchange(int*p1,int*p2)
{
 int k;
 k=*p1;
 *p1=*p2;
 *p2=k;
}