将输入的值传给函数，下面写合理吗
但是我运行函数时有点问题，麻烦大家帮我看看好吗~~谢谢

#include <iostream.h>
void even(int &);
main()
{
int y,&x=y;
do {
cout<<"请输入整数：";
cin>>y;
cout<<even(x);
}while((y=cin.get())!=EOF);
}
void even(int &a)
{
if ((a%2)==0)
cout<<a<<"是偶数。"<<endl;
else
cout<<a<<"不是偶数。"<<endl;
}

#include <iostream>

using namespace std;

void even(int &);
int main()
{
	int y,&x=y;
	do {
		cout<<"please input int number";
		cin>>y;
		even(x);
}while((y=cin.get())!=EOF);
}
void even(int &a)
{
	if ((a%2)==0)
		cout<<a<<"is even number"<<endl;
	else
		cout<<a<<"isn't even number"<<endl;
	return;
}