1)#include < iostream > 2)#include < cmath > 3)using namespace std; 4)double max(double x,doubley) 5){ 6)if(x>y) 7)return x; 8)else 9)return y; 10)} 11)int main() 12){ 13)doublea,b,c; 14)cout < 15)cin >> a >> b; 16)c=max(a,b); 17)cout < 18)}执行第15行时,若输入“8空格9回车”,则执行完第18行后,命令提示符窗口中新输出的结果是:()
A. the squart of max imum=sqrt
B. the squart of max imum=3.08221
C. the squart of max imum=3
D. the squart of max imum=9.0