OJ Board

all the sample input and outputs are matching!! still y wrong answer???

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

const double pi=3.141592653589793;
int main(){
double x1, y1, x2, y2, x3, y3;
double h, k, r, c;
double m1, m2;
char a, b, s;
while(scanf("%lf%lf%lf%lf%lf%lf", &x1, &y1, &x2, &y2, &x3 ...