#include<stdio.h> #include<math.h> int main(){ double x1, y1, x2, y2; while(scanf("%lf %lf %lf %lf", &x1, &y1, &x2, &y2) != EOF){ double x = (x1 - x2) * (x1 - x2); double y = (y1 - y2) * (y1 - y2); double distance = sqrt(x + y); printf("%.2f\n", distance); } return 0; }
0.0分
0 人评分