C++作业2：距离

一。代码

#include<cmath>#include<iostream.h>void main(){double x1,y1,x2,y2,m;cin>>x1>>y1>>x2>>y2;    m=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));    cout<<m<<endl;}

二。运行结果