PAT：分支-16. 计算分段函数(10) AC

#include<stdio.h>
#include<math.h>
int main()
{
  double x;
  scanf("%lf",&x);
  if(x>=0)
    printf("f(%.2lf) = %.2lf
",x,pow(x,0.5));
  else
    printf("f(%.2lf) = %.2lf
",x,(pow(x+1,2))+2*x+1/x);
  return 0;
}