题意：给定你三个圆心，三个圆相交，求每个圆心大小
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 #include <math.h>
5 double distance(double x1,double y1,double x2,double y2)
6 {
7 return sqrt((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2));
8 }
9 int main()
10 {
11 double x1,x2,x3,y1,y2,y3;
12 while(scanf("%lf %lf %lf %lf %lf %lf",&x1,&y1,&x2,&y2,&x3,&y3) != EOF)
13 {
14 double d1 = distance(x1,y1,x2,y2);
15 double d2 = distance(x1,y1,x3,y3);
16 double d3 = distance(x2,y2,x3,y3);
17 double a,b,c;
18 a = (d1+d3-d2)*1.0/2;
19 b = (d2+d3-d1)*1.0/2;
20 c = (d1+d2-d3)*1.0/2;
21 printf("%lf\n%lf\n%lf\n",c,a,b);
22
23 }
24 return 0 ;
25 } View Code