Eming

问题 A : Eming
题目描述
Eming is a contest hold by WHUACM training team. The aim is to select new members of the team. 
Usually, the first problem is a very simple problem such as “a+b problem”. But this time, Xioumu is tired of this kind of problem, he decide to solve “a and b problem”.
Give you the result of a + b and a^2 – b^2, please output the result of a and b.
输入格式
There are several test cases. For each case there are two double numbers indicating a+b and a^2-b^2. You may assume that a+b will not be zero.
输出
For each case please output the result of a and b in one line, rounded to 2 decimal places.
样例输入
3 -3
样例输出
1.00 2.00

#include

int main()
{
double x,y,m;
double a,b;
while(scanf("%lf%lf",&x,&y)!=EOF)
{
m=(y/x);
a=(x+m)/2;
b=(x-m)/2;
printf("%.2lf %.2lf\n",a,b);
}
return 0;
}