c++上机作业-2

#include<iostream>
using namespace std;
int main()
{
int x;
cout<<"请输入x的值:";
cin>>x;
if(x>=1)
cout<<x-1;
else
cout<<-x+1;

}

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

#include<iostream>
using namespace std;
int main()
{
int m,x;
cout<<"请输入密码m:";
cin>>m;
if(m=971001)
{
cout<<"查询选项功能:";
cout<<"1.查询"<<endl;
cout<<"2.取款"<<endl;
cout<<"3.存款"<<endl;
cout<<"4.转帐"<<endl;
cout<<"0.退出"<<endl;
cout<<"功能选择";
cin>>x;
cout<<"谢谢您选择x号功能";
}
return 0;
}