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.

一般的错误代码会是这样的：

#include<stdio.h>
int main()
{
       int a,n;
       scanf("%d",&a);
       scanf("%d",&b);
       printf("%d\n",a+b);
       return 0;
      
}

按照题目要求的正确代码：