HDU_ACM_A+B for Input-Output Practice (I)

Problem Description Your task is to Calculate a + b. Too easy?! Of course! I specially designed the problem for acm beginners. You must have found that some problems have the same titles with this one, yes, all these problems were designed for the same aim.

Input The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.

Output For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.

Sample Input 1 5 10 20

Sample Output 6 30

#include 
int main()
{
   int a,b;
  while(scanf("%d%d",&a,&b)!=EOF)
  {
    printf("%d\n", a+b);
    
	}
      return 0;
}

/*
scanf函数有返回值
scanf函数返回的是输入的数据的个数,什么都不输入代表-1
测试代码：
#include "stdio.h"
int main(){
int a,b;
for(;;){
printf("%d",scanf("%d%d",&a,&b));
}
return 0;
} 
在scanf("%d %d",&a,&b)==2 中如果输入两个数字那么scanf函数会返回一个2
如果直接输入ctrl+Z 那么scanf函数返回-1

同样要注意的是：C语言规定EOF = -1
输入两个数字 scanf返回结果2 输入ctrl+z 返回 -1
-1 == -1 循环终止
*/