C++作业2

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

#include<iostream>
using namespace std;
int main()
{
double H,W,SW;
cout<<"输入身高，体重:";//身高单位为厘米，体重单位为千克
cin>>H>>W;
SW=H-100;
cout<<"标准体重="<<SW<<endl;
if(W>1.2*SW)
cout<<"体重超重"<<endl;
else
{
if(W<0.8*SW)
cout<<"体重超轻"<<endl;
else
cout<<"体重正常"<<endl;
}
return 0;
}

#include<iostream>
using namespace std;
int main()
{
int password=199802,S,X;
cout<<"郑氏银行欢迎您"<<endl;
cout<<"请输入密码:";
cin>>S;
if(S==password)
{
cout<<"密码正确"<<endl;
cout<<"请选择操作内容:1.查询2.取款3.存款4.转帐0.退出"<<endl;
cin>>X;
if(X==1)
cout<<"谢谢，您选择了1号功能"<<endl;
else if(X==2)
cout<<"谢谢，您选择了2号功能"<<endl;
else if(X==3)
cout<<"谢谢，您选择了3号功能"<<endl;
else if(X==4)
cout<<"谢谢，您选择了4号功能"<<endl;
else if(X==0)
cout<<"谢谢，您选择了0号功能"<<endl;
}
if(S!=password)
cout<<"对不起，密码错误，请重新输入"<<endl;
return 0;
}