4

Calculate A + B.
Input
Each line will contain two integers A and B. Process to end of file.
Output
For each case, output A + B in one line.
Sample Input
1 1
Sample Output
2
问题链接：https://vjudge.net/problem/hdu-1000?tdsourcetag=s_pctim_aiomsg
问题简述：每次输入A,B的值时，输出A+B的值
问题分析：用while语句使每次输入都能够输出A+B的值，注意换行即可
AC通过的C++语言程序如下：

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