第十五周oj平台：指针当形参

<pre name="code" class="cpp">#include <iostream>
using namespace std;
void jiaohuan(int *p1, int *p2);
int main( )
{
    int a,b;
    cin>>a>>b;
    jiaohuan(&a,&b);
    cout<<a<<" "<<b<<endl;
    return 0;
}
void jiaohuan(int *p1, int *p2)
{
    int t;
    t=*p1;
    *p1=*p2;
    *p2=t;
    return;
}