plz give proper program question
2009/9/16 Seedrick <[email protected]>
>
> Someone please tell me what is the problem in my code
>
> #define sq(a) ((a)*(a))
> #define ERR 1e-7
> int main() {
> freopen("B-small-attempt11.in","r",stdin);
> freopen("B-small-attempt11.out","w",stdout);
> int tc,i,j,k,n,a,b,c,va,vb,vc;
> double u[3],ap,dot,dmin,tmin,mod;
> cin >> tc;
> for(i=0;i<tc;i++) {
> cin >> n;
> vector<double> p(3,0.0);
> vector<double> v(3,0.0);
> for(j=0;j<n;j++) {
> cin >> a >> b >> c >> va >> vb >> vc;
> p[0]+=a;
> p[1]+=b;
> p[2]+=c;
> v[0]+=va;
> v[1]+=vb;
> v[2]+=vc;
> }
> p[0]=p[0]/n;
> p[1]=p[1]/n;
> p[2]=p[2]/n;
>
> v[0]=v[0]/n;
> v[1]=v[1]/n;
> v[2]=v[2]/n;
>
> mod = sqrt ( sq(v[0])+sq(v[1])+sq(v[2]) );
> if(mod < ERR )
> {
> mod=0.0;
> dmin=sqrt (sq(p[0])+sq(p[1])+sq(p[2]));
> if(dmin < ERR)
> dmin =0.0 ;
> printf("Case #%d: %.8lf %.8lf\n",i+1,dmin,mod);
> continue;
> }
> u[0]=v[0]/mod;
> u[1]=v[1]/mod;
> u[2]=v[2]/mod;
> ap=sq(p[0])+sq(p[1])+sq(p[2]);
> dot=p[0]*u[0]+p[1]*u[1]+p[2]*u[2];
> if(fabs(dot) < ERR)
> {
> dmin = sqrt(ap);
> tmin=0.0;
> }
> else
> {
> dmin= ap-sq(dot);
> dmin = sqrt(dmin);
> tmin = (fabs(dot))/mod;
> }
> printf("Case #%d: %.8lf %.8lf\n",i+1,dmin,tmin);
> }
> return 0;
> }
> >
>
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