编写一个程序，不断要求用户输入两个数，直到其中一个数为0

代码如下：

#include <iostream>
using namespace std;
double Average(double,double);

int main()
{
double a,b,average;
cout<<"Please enter two number:\n";
while (cin>>a>>b&&a!=0&&b!=0)
{
average=Average(a,b);
cout<<"Harmonic average: "<<average<<endl;
cout<<"Please enter two number:\n";
continue;
}
cout<<"Bye!!";
return 0;
}

double Average(double a,double b)
{
double average;
average=2*a*b/(a+b);
return average;
}