HDU1000A+B problem c++

计算a+b，没什么好说的。主要是学无限输入
while(cin>>a>>b){}
while(scanf("%d%d",&a,&b)!=EOF) {}
while(~scanf("%d%d",&a,&b)){}

#include<iostream>
using namespace std;
int main()
{
	int a, b;
	while (cin >> a >> b)
	{
		cout << a+b<<endl;
	}
	return 0;
}