uva375 Inscribed Circles and Isosceles Triangles

#include <stdio.h>
#include <math.h>

#define LOCAL
#define PI asin(1.0) * 2
int main()
{
int tests;
double B, h, H;
double r, R;
double edge;
int i;

#ifdef LOCAL
freopen("c://uva_in.txt", "r", stdin);

#endif

scanf("%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");
}
}

    return 0;
}