c++实验2

一，分段函数

#include<iostream.h>void main(){int x,y;cout<<"请输入x的值"<<endl;cin>>x;if(x>=1)y=x-1;elsey=1-x;cout<<"函数值为"<<y<<endl;}

二，两点距离

#include<iostream.h>#include<cmath>void main(){double x1,x2,y1,y2,a,b,c;cout<<"请输入坐标一的横纵坐标"<<endl;cin>>x1>>y1;cout<<"请输入坐标二的横纵坐标"<<endl;cin>>x2>>y2;a=x1-x2;b=y1-y2;c=sqrt(a)+sqrt(b);cout<<"两坐标距离为"<<c<<endl;}

三，模拟ATM机

#include<iostream.h>void main(){int a,b,x;a=199705;cout<<"某某银行欢迎您"<<endl;cout<<"请输入密码"<<endl;cin>>b;if(a!=b)cout<<"您的密码错误"<<endl;elsecout<<"1查询"<<'\n'<<"2取款"<<'\n'<<"3存款"<<'\n'<<"4转账"<<'\n'<<"0退出"<<'\n'<<endl;cin>>x;cout<<"谢谢，您选择了"<<x<<"号程序"<<endl;}