uva375 Inscribed Circles and Isosceles Triangles

#include <stdio.h>#include <math.h>#define LOCAL#define PI asin(1.0) * 2intmain()
{
inttests;
doubleB, h, H;
doubler, R;
doubleedge;
inti;
#ifdef LOCALfreopen("c://uva_in.txt", "r", stdin);
#endifscanf("%d", &tests);
for (i=0; i<tests; i++)
    {
scanf("%lf%lf", &B, &H);
edge=sqrt(B*B/4+H*H);
R=B*H/ (2*edge+B);
h=H;
r=R;
while (r>=0.000001)
        {
h-=2*r;
r=h*R/H;
        }
printf("%13lf/n", (H-h) *PI);
if (i<tests-1)
        {
printf("/n");
        }
    }
return0;
}