A + B Problem

A + B Problem

Problem Description
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

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

Wrong Answer
原因：理解错题意，本题要求把每一行的两个数字加起来，然后打印出来，直到文件末尾。我理解为将两个数加起来，输出它们的和。

include <iostream>
using namespace std;
int main()
{
    int a,b;
    while(1)
    {
        cin>>a>>b;
        cout<<a+b<<endl;
    }
    return 0;
}

Time Limit Exceeded
while(1)始终是真，因此会一直要求输入，所以会超时.正确做法把输入放在判断出，那么当你输入到最后也就是不想再输入的时候它会停止的

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