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Re:WA 了 一下午 是在是不知道哪错了。。。。。。In Reply To:WA 了 一下午 是在是不知道哪错了。。。。。。 Posted by:muyue at 2008-08-15 15:04:15 > #include<stdio.h> > #include<string.h> > #include<math.h> > #define pi 3.14159265358 > int main(){ > int i,j,k,m,n; > double x1,y1,r1,x2,y2,r2,r,r3,s,area; > double A,B; > while(scanf("%lf %lf %lf %lf %lf %lf",&x1,&y1,&r1,&x2,&y2,&r2)!=EOF){ > r=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1)); > if(r1<r2) > { r3=r1; > r1=r2; > r2=r3;} > // printf("r1==%.3lf r2==%.3lf r=%.3lf\n",r1,r2,r); > if(r>=r1+r2) > printf("0.000\n");//相离或相切 > else if(r<=r1-r2){ > printf("%.3lf\n",pi*r2*r2); > } > else { > A=acos((r1*r1+r*r-r2*r2)/(2*r1*r)); > B=acos((r2*r2+r*r-r1*r1)/(2*r*r2)); > s=(r1+r2+r)/2; > s=sqrt(s*(s-r1)*(s-r2)*(s-r)); > area=A*r1*r1+B*r2*r2-2*s; > > printf("%.3lf\n",area); > } > } > > return 0; > } > Followed by: Post your reply here: |
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