c语言高手进 -1.#IND00求救！！

Question

小弟自己写的一个物理实验计算数值的程序
输入0.0 60.1 110.3这组数据就显示-1.#IND00 怎么回事？？

#include <stdio.h>
#include <math.h>
main()
{
int i;
double c=2982.0,t1,t2,t3,r1,r2,A,B,D,x1=0.0,y1=0.45,x2=0.3,y2=0.0,p,q,x,y,r;
for (i=1;i<=9;i++){
scanf ("%f %f %f",&t1,&t2,&t3);
t1=t1/1000000;
t2=t2/1000000;
t3=t3/1000000;
r1=c*(t1-t3);
r2=c*(t2-t3);
A=x2*(x1*x1+y1*y1-r1*r1)-x1*(x2*x2+y2*y2-r2*r2);
B=y2*(x1*x1+y1*y1-r1*r1)-y1*(x2*x2+y2*y2-r2*r2);
D=r1*(x2*x2+y2*y2-r2*r2)-r2*(x1*x1+y1*y1-r1*r1);
q=atan(B/A);
p=acos(D/(sqrt(A*A+B*B)))+q;
if ((p>=90) || (p<=0))
p=q-acos(D/sqrt(A*A+B*B));
r=(x1*x1+y1*y1-r1*r1)/(2*(x1*cos(p)+y1*sin(p)+r1));
x=r*cos(p)*1000;
y=r*sin(p)*1000;
printf ("%1f %1f\n",x,y);
}
return 0;
}

改好了能用了再+50分

Answer 1

输入类型不对

#include <stdio.h>
#include <math.h>
main()
{
int i;
double c=2982.0,t1,t2,t3,r1,r2,A,B,D,x1=0.0,y1=0.45,x2=0.3,y2=0.0,p,q,x,y,r;
for (i=1;i<=9;i++)
{
scanf ("%lf %lf %lf",&t1,&t2,&t3);
t1=t1/1000000;
t2=t2/1000000;
t3=t3/1000000;
r1=c*(t1-t3);
r2=c*(t2-t3);
A=x2*(x1*x1+y1*y1-r1*r1)-x1*(x2*x2+y2*y2-r2*r2);
B=y2*(x1*x1+y1*y1-r1*r1)-y1*(x2*x2+y2*y2-r2*r2);
D=r1*(x2*x2+y2*y2-r2*r2)-r2*(x1*x1+y1*y1-r1*r1);
q=atan(B/A);
p=acos(D/(sqrt(A*A+B*B)))+q;
if ((p>=90) || (p<=0))
p=q-acos(D/sqrt(A*A+B*B));
r=(x1*x1+y1*y1-r1*r1)/(2*(x1*cos(p)+y1*sin(p)+r1));
x=r*cos(p)*1000;
y=r*sin(p)*1000;
printf ("%1lf %1lf\n",x,y);
}
return 0;
}