我的C++第二次作业

一.分段函数

#include  <iostream>

using namespace std;

int main()

{

        int x,y;

        cout<<"输入x的值";

        cin>>x;

        if(x>=1)

        y=x-1;

        if(x<1)

        y=-x+1;

        cout<<y;

        return 0;

}

二.求两点间距离

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

          double x1,y1,x2,y2,distance;

          cin>>x1>>y1>>x2>>y2;

          distance=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));

          cout<<distance;

          return 0;

}

三.模拟ATM

#include <iostream>

using namespace std;

int main()

{

           cout<<"洋洋银行欢迎你“；

           cout<<"请输入密码";

           cin>>"密码";

           if("密码=521911")

          cout<<"1.查询2.取款3.存款4.转账0.退款";

          else

          cout<<"密码错误,请重新输入";

          return 0;

}