c++第二次作业

项目2

#include<iostream>#include<cmath>using namespace std;int main(){double x,y;cout<<"请输入x:"<<endl;cin>>x;if(x>=1){y=x-1; cout<<"y="<<y<<endl;}else{y=1-x; cout<<"y="<<y<<endl;}return 0;}

项目3

#include<iostream>#include<cmath>using namespace std;int main(){double x1,y1,x2,y2,d;cout<<"请输入x1,y1"<<endl;cin>>x1>>y1;cout<<"请输入x2,y2"<<endl;cin>>x2>>y2;d=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));cout<<"两点之间的距离d="<<d<<endl;return 0;}

项目4

#include<iostream>using namespace std;int main(){int pw,x;cout<<"高氏银行欢迎您"<<endl;cout<<"请输入密码";do{     cin>>pw;        if(pw==961128)            cout<<"密码正确"<<endl;        else            cout<<"密码错误,请重新输入"<<endl;}while(pw!=961128);cout<<"功能选项"<<endl;cout<<"1.查询"<<"2.取款"<<"3.存款"<<"4.转账"<<"0.退出"<<endl;cin>>x;cout<<"谢谢您选择了"<<x<<"号功能"<<endl;}