HDU 2001 计算两点间的距离 

 1 #include<stdio.h>
 2 #include<math.h>
 3 int main()
 4 {
 5     double x1,y1,x2,y2,r;
 6     while(scanf("%lf%lf%lf%lf",&x1,&y1,&x2,&y2)!=EOF)
 7     {
 8         r=sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
 9         printf("%.2lf\n",r);
10     }
11     return 0;
12 }

posted on 2012-08-03 17:46  mycapple  阅读(1066)  评论(0)    收藏  举报

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