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 }
转载于:https://www.cnblogs.com/mycapple/archive/2012/08/03/2622044.html