C++作业2

#include<iostream>
#include<cmath>
using namespace std;
int main()
{ double x,y;
cout<<"请输入变量x:";
cin>>x;
if(x>=1)
y=x-1;
else
y=-x+1;
cout<<"输出y="<<y<<endl;
return 0
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x1,y1,x2,y2,d;
cout<<"请输入x1,y1"<<endl;
cin>>x1>>y1;
cout<<"请输入x2,y2"<<endl;
cin>>x2>>y2;
d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
cout<<"两点之间的距离d="<<d<<endl;
return 0
}