我的C++处女作~~别看了~~惨不忍睹呀

我的C++处女作~~别看了~~惨不忍睹呀
#include
#include
using namespace std;
/*
*/
void swap();
int main()
{
string user_name;
int i,ii,iii;
cout << "please enter your first name:";
cin >> user_name;
cout << "\n"
<<"Hello."
<< user_name
<<"...and goodbye!\n";
cin >> i;
cin >>ii;
cout << i <<"\t" << ii << "\n";
swap(i,ii);
cout << i <<"\t" << ii << "\n";
cin >>iii;
return 0;
}
void swap(int &v1,int &v2)
{
int temp = v1;
v1 = v2;
v2 = temp;
}