题解 | 绕距
绕距
https://www.nowcoder.com/practice/7a245fc6284f4139b4fb21de58e68483
#include <cmath>
#include <iostream>
#include <iomanip>
using namespace std;
int main() {
double x1, x2,y1,y2;
double de,dm;
cin>>x1>>y1;
cin>>x2>>y2;
de=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
dm=fabs(x1-x2)+fabs(y1-y2);
cout<<fixed<<setprecision(6)<<fabs(de-dm);
}
// 64 位输出请用 printf("%lld")
