C++项目实践

系统功能描述：
实现以下几个功能：1、查询。2、取款。3、存款。4、转账。5、修改密码。6、退出。由用户输入功能进行选择，使用switch多分支完成对应功能.

#include<iostream>
#include<iomanip>
#include<conio.h>
using namespace std;
int password = 666666;/*设置银行卡密码（全局变量）*/
double balance = 5000;/*设置初始银行卡的额度（全局变量）*/
bool Input_pass();/*模块：判定输入的密码是否正确*/
void work();/*模块：业务选择*/
void display_blance();/*模块：查询*/
void draw_blance();/*模块：取款*/
void save_money();/*模块：存款*/
void transfer_Accounts();/*模块：转账*/
void updatePassword();/*模块：修改银行卡密码*/
void menu_select();/*模块：功能选择界面*/
void Bank_Card();/*模块：显示银行卡信息*/
void Bank_Card()
{
    
 cout << "**********银行卡**********" << endl;
 cout << "*                        *" << endl;
 cout << "*密码：" << password << setw(13) << "*" << endl;
 cout << "*余额：" << balance << setw(15) << "*" << endl;
 cout << "*                        *" << endl;
 cout << "**************************" << endl;
}
void menu_select()
{
    
 cout << "***********************************" << endl;
 cout << "*           银行储存系统          *" << endl;
 cout << "*             1、查询             *" << endl;
 cout << "*             2、取款             *" << endl;
 cout << "*             3、存款             *" << endl;
 cout << "*             4、转账             *" << endl;
 cout << "*             5、修改密码         *" << endl;
 cout << "*             0、退出             *" << endl;
 cout << "***********************************" << endl;
 cout << endl << endl;
}
void updatePassword()
{
    
 int p1, p2;
 cout << "请输入旧密码：" << endl;
 cin >> p1;
 if (p1 != password)
 {
    
  cout << "初始密码错误！不允许修改密码！" << endl;
 }
 else
 {
    
  cout << "请输入新密码：" << endl;
  cin >> p1;
  cout << "请再次输入新密码：" << endl;
  cin >> p2;
  if (p1 == p2)
  {
    
   password = p1;
   cout << "密码修改成功！" << endl;
  }
  else
  {
    
   cout << "再次输入不一致，密码修改失败！" << endl;
  }
 }
}
void transfer_Accounts()
{
    
 double money;
 int iAccount2;
 cout << "请输入转账金额：" << endl;
 cin >> money;
 cout << "请输入对方账户：" << endl;
 cin >> iAccount2;
 if (money <= balance)
 {
    
  balance = (balance - money);//取款成功
  cout << "转给" << iAccount2 << "后，您的余额为：" << balance << "元。" << endl;
 }
 else
 {
    
  cout << "您的余额不足，无法进行转账！" << endl;
 }
}
void save_money()
{
    
 double money;
 cout << "请输入存款金额：" << endl;
 cin >> money;
 balance = balance + money;
 cout << "存款后，您的余额为：" << balance << "元。" << endl;
}
void draw_blance()
{
    
 double money;
 cout << "请输入取款金额：" << endl;
 cin >> money;
 if (money <= balance)
 {
    
  balance = balance - money;
  cout << "取款后，您的余额为：" << balance << "元。" << endl;
 }
 else
 {
    
  cout << "您的余额不足，取款失败！" << endl;
 }
}
void display_blance()
{
    
 cout << "您的余额为：" << balance << endl;
}
void work()
{
    
 char ch;
 bool Bexit = false;
 cout << setw(10) << "|欢迎使用银行储存系统|" << setw(10) << endl;
 menu_select();
 do 
 {
    
  cout << endl << "请选择需要办理的业务：";
  cin >> ch;
  switch (ch)
  {
    
  case '1':
   display_blance();
   break;
  case '2':
   draw_blance();
   break;
  case '3':
   save_money();
   break;
  case '4':
   transfer_Accounts();
   break;
  case '5':
   updatePassword();
   break;
  case '0':
   system("cls");
   Bank_Card();
   cout << "温馨提示：请您取回您的银行卡。" << endl;
   Bexit = true;
  }
 } while (!Bexit);
}
bool Input_pass()
{
    
 bool Bpass = false;
 int Ipass;
 int num = 1;
 do 
 {
    
  cout << "请输入密码：";
  if (num > 1)
   cout << "温馨提示：这是第" << num << "次输入密码，三次不对将没收银行卡！" << endl;
  cin >> Ipass;
  num++;
  if (Ipass == password)
  {
    
   Bpass = true;
  }
 } while (!Bpass&&num < 4);
 system("cls");
 return Bpass;
}
int main()
{
    
 Bank_Card();
 if (Input_pass())
 {
    
  work();
 }
 else
  cout << "密码错误已超出当天上限，请联系工作人员！" << endl;
 return 0;
}

以上代码均亲自测试过能运行，如果有人发现有小bug还请在评论区留言，我好进行修改，谢谢大家！