delete pics to save space

2.11731.cpp

@@ -0,0 +1,46 @@
+#include<cstdio>
+#include<cmath>
+const double pi=acos(-1.0);
+double area(double a,double b,double c)
+{
+	double p=(a+b+c)/2.0;
+	return sqrt(p*(p-a)*(p-b)*(p-c));
+}
+double area2(double a,double B,double C)
+{
+	double A=pi-B-C;
+	double b=a*sin(B)/sin(A);
+	double c=a*sin(C)/sin(A);
+	return area(a,b,c);
+}
+double area3(double a,double B,double C)
+{
+	double A=pi-B-C;
+	double r=area2(a,B,C)/a*2.0;
+	return r*r*A/2;
+}
+int kase;
+double a,b,c,A,B,C,aa,bb,cc,sa,sb,sc;
+double ha,hb,hc,s,t;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%lf%lf%lf",&a,&b,&c)==3&&!(a==0&&b==0&&c==0))
+	{
+		A=acos((b*b+c*c-a*a)/(2.0*b*c));
+		B=acos((a*a+c*c-b*b)/(2.0*a*c));
+		C=acos((a*a+b*b-c*c)/(2.0*a*b));
+		aa=(pi-A)/2;
+		bb=(pi-B)/2;
+		cc=(pi-C)/2;
+		sa=area2(a,bb,cc);
+		sb=area2(b,aa,cc);
+		sc=area2(c,aa,bb);
+		s=area(a,b,c)+sa+sb+sc;
+		t=area3(a,bb,cc)+area3(b,aa,cc)+area3(c,aa,bb);
+		printf("Case %d: %.2lf %.2lf\n",++kase,s,t);
+	}
+	return 0;
+}