银行

#include <iostream>#include <cmath>const password=12260719;using namespace std;bool pass();void showbalance();void work();void zz();void qk();void ck();double huankuan() ;void chioce();int main(){    cout<<'\t'<<'\t'<<'\t'<<'\t'<<" 王氏银行欢迎您! "<<endl;if(pass()==true){work();}else{cout<<"请到柜台办理密码业务再来使用!  谢谢! "<<endl;}    return 0;}bool pass(){    int i=1,pass;bool k=false;    do{        cout<<"请输入密码："<<endl;        cin>>pass;        i++;        if(pass==password){            k=true;        }        else{k=false; continue;} if(k)   return true;   else   return false;    }while(i<4);  }void chioce(){   cout<<"***请您选择服务内容:"<<endl;   int i;   char cChioce;   void chaxun();   void qukuan();   void cunkuan();   void zhuanzhang();cout<<"*  1. 查询"<<endl;cout<<"*  2. 取款"<<endl;cout<<"*  3. 存款"<<endl;cout<<"*  4. 转账"<<endl;cout<<"*  5. 还款"<<endl;cout<<"*  0. 退出"<<endl;cout<<"*  请选择（0-5）：";cin>>cChioce;if (cChioce=='1')showbalance();else if (cChioce=='2')    qk();else if (cChioce=='3') ck();        else if (cChioce=='4')             zz();else if (cChioce=='5') huankuan();else if (cChioce=='0'){    cout<<endl<<endl;cout<<"***"<<"欢迎您下次光临！"<<endl<<endl;}}void showbalance(){cout<<"您的余额是12260719元 。"<<endl;}void work(){chioce();}double huankuan()  {  double principal,rate,payPerYear,numYears,e,b,denom,payment,number;          cout<<"请输入本金:";  cin>>principal;  cout<<"请输入当前利率:";  cin>>rate;           cout<<"请输入还款年限:";           cin>>numYears;           cout<<"请输入每年偿还贷款的次数:";           cin>>payPerYear;      number=rate*principal/payPerYear;                 e=-(payPerYear*numYears);  b=(rate/payPerYear)+1;  denom=1-pow(b,e);  payment=number/denom;  cout<<"Payment is :"<<payment<<endl;             return 0;  } void zz(){int numb,money;cout<<"请输入转账的银行卡卡号："<<endl;cin>>numb;cout<<"请输入转款额度："<<endl;cin>>money;cout<<"由于操作错误，你的资金将被扣留!"<<endl;}void ck(){int my;cout<<"请输入存款额度："<<endl;cin>>my;cout<<"由于机器故障，你的现金已经被吞没，请自认倒霉!"<<endl;}void qk(){ int money;cout<<"请输入取款金额："<<endl;cin>>money;cout<<"请验钞，谢谢使用!"<<endl;}