#include<iostream> #include<cstdio> using namespace std; int main() { double a, b, x, y; while (cin >> a && cin >> b && cin >> x && cin >> y) { double ans = sqrt((x - a)*(x - a) + (y - b)*(y - b)
--通过经纬度计算两点之间的距离 create FUNCTION [dbo].[fnGetDistanceNew] --LatBegin 开始经度 --LngBegin 开始维度 --29.490295,106.486654,29.615467, 106.581515 (), ),)) Returns real AS BEGIN --转换location字段,防止字段太长.影响SQL美观 declare @LatBegin REAL declare @LngBegin REAL declare
There are n houses in the village and some bidirectional roads connecting them. Every day peole always like to ask like this "How far is it if I want to go from house A to house B"? Usually it hard to answer. But luckily int this village the ans