sicily. 1815 计算两点间的距离

#include <iostream>#include <cmath>#include <stdio.h>using namespace std;int main(){int caseNum;cin >> caseNum;while(caseNum--){double x1,y1,x2,y2;cin >> x1 >> y1 >> x2 >> y2;double dis = sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));printf("%.2f\n",dis);}return 0;}