Description
Input
Output
Sample Input
Sample Output
#include<stdio.h> #include<math.h> int main() { double a,b,c,d,L; while(scanf("%lf %lf %lf %lf",&a,&b,&c,&d)!=EOF) { L=(c-a)*(c-a)+(d-b)*(d-b); printf("%.2lf\n",sqrt(L)); } return 0; }
原文:http://www.cnblogs.com/hfc-xx/p/4883469.html