比较两数的大小

#include<iostream>
using namespace std;
int main()
{
int a, b;
cin >> a >> b;
while (a&&b)
{
if (a > b)
{
cout << "a > b"<< endl;
}
else if (a < b)
{
cout << "a <b" << endl;
}
else if (a =b)
{
cout << "a = b" << endl;
}
cin >> a >> b;
}
system("pause");
return  0;
}