孙敬哲的c++上机实验2-2

#include<iostream>
using namespace std;
int main()
{
int x,y;
cout<<"输入一个整数";
cin>>x;
if(x>=1)
y=x-1;
else y=-x+1;
cout<<"y="<<y;
return 0;
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
double x1,y1,x2,y2,d;
cout<<"输入两个点的坐标,x1,y1,x2,y2,";
cin>>x1>>y1>>x2>>y2;
d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
cout<<"两点间的距离="<<d;
return 0;
}

#include<iostream>
using namespace std;
int main()
{
int password,x;
cout<<"孙行者银行欢迎您"<<endl;
cout<<"请输入密码:";
cin>>password;
if(password=123456)
{
cout<<"1.查询2.取款 3.存款4.转帐0.退出"<<endl;
cout<<"请输入选项";
cin>>x;
if(x=1)
cout<<"谢谢，您选择了查询功能";
else if(x=2)
cout<<"谢谢，您选择了取款功能";
else if(x=3)
cout<<"谢谢，您选择了存款功能";
else if(x=4)
cout<<"谢谢，您选择了转账功能";
else if(x=0)
cout<<"谢谢，欢迎下次光临";
else cout<<"谢谢";
}
else cout<<"密码错误";
return 0;
}