C语言设计银行账户模拟程序

能传附件吗？不知道怎么传。我就贴给你吧。
#include
#include
#include
using namespace std;

class account //atm账户类
{
private:
string CardNum,Psw; //卡号、密码
float Balance;
public:
friend class ATM; //atm为友元
/*void get_cardnum();
void get_psw();
void get_balance();*/
account(){}//<---------------------here
account(string num,string passwd,float balance); //构造函数
void Write();
};

class ATM //atm机类
{
private:
int times;
account *ac;
public:
ATM(); void load( account *act ); //装入账户信息
void welcome(); //初始欢迎信息
bool check_passwd( string pwd ); //验证当前账户信息的密码
void change_psw(); //修改密码
void get_money(); //取钱
float check_balance(); //查账
void tran(); //转账
void exit(); //退卡
void function_show(); //显示功能菜单
void lock(); //锁定账户
};

/*
* account::account( string num, string passwd, float balance )
* account类构造函数
* 用途： 使用给定的账号密码等信息初始化一个account对象
* 参数： string num 账号
* string passwd 密码
* float balance
*/
account::account( string num, string passwd, float balance )
{
CardNum = num;
Psw = passwd;
Balance = balance;
}
//atm类构造函数
/*account::get_cardnum()
{
return CardNum;
}
account::get_psw()
{
return Psw;
}
account::get_balance()
{
return Balance;
}*/
void account::Write()
{
ofstream outfile("atm.txt",ios::binary);//<-----------------here
outfile.write((char *)(this),sizeof(account));//<-------------here
outfile.close();
}

ATM::ATM()
{
}

/*
* void ATM::load( account *act )
* ATM类装入账户信息函数
* 用途： 载入指定的account对象，模拟atm插卡过程
* 参数： account *act 要载入的account对象指针
*/
void ATM::load( account *act )
{
ac = act;
}

/*
* void ATM::welcome()
* ATM类显示初始欢迎信息函数
* 用途： 显示欢迎信息，提示密码输入并验证
* 参数： 无
*
*/
void ATM::welcome()
{
times = 0; //记录密码输入错误次数
cout << "Welcome to use the China Bank ATM!" << endl;
string pwd; //这一个语句应该上移的，一般来说数据的定义和初始化一块写在开头，下面才是各种操作的语句
while( times < 3 )
{
cout << "Please enter the password: " << endl;
cin >> pwd;
if( !check_passwd( pwd ) )
{
cout << "The password you entered is wrong, please enter again" << endl;
times++;
}
else
{
function_show();
break;
}
}
if( times >= 3 )
lock(); //输入密码错误次数超过（等于）3次，锁定账户
}

bool ATM::check_passwd( string pwd )
{
if( pwd == ac->Psw )
return true;
else
return false;
}

void ATM::function_show()
{
int n;
cout << "(1) Change Password" << endl;
cout << "(2) Get Money" << endl;
cout << "(3) Check Balance" << endl;
cout << "(4) Transfer accounts" << endl;
cout << "(5) Exit" << endl;
cin >> n;
while(n != 1 && n != 2 && n != 3 && n != 4 && n != 5) //这样就可以完全限制用户的输入
{
cout << "Please enter the right number" << endl;
cin >> n;
}
switch( n )
{
case 1:
change_psw();
break;
case 2:
get_money();
break;
case 3:
cout << check_balance() << endl;
break;
case 4:
tran();
break;
case 5:
exit();
break;

}
}

void ATM::lock()
{
cout << "Sorry! Your card has been confiscated!" << endl;
exit();
}

void ATM::change_psw()
{
string old_psw, new_psw1, new_psw2;
int t = 0 ;
while( t < 3 )
{
cout << "Please enter the old password: ";
cin >> old_psw;
if( !check_passwd( old_psw ) )
{
cout << "The password you enter is wrong, please enter again" << endl;
t++;
}
else
{
cout << "Please enter the new password: ";
cin >> new_psw1;
cout << "Please enter the new password again: ";
cin >> new_psw2;
if( new_psw1 == new_psw2 )
{
ac -> Psw = new_psw2;
cout << "You have change your password successfully!" << endl;
break;
}
else
cout << "Sorry, entered passwords do not match! " << endl;
}
}
//}//<----------------------here
if( t >= 3 )
{
cout << "Sorry, you have inputed the wrong password for three times and more! " << endl;
}
}

void ATM::get_money()
{
float money;
cout << "Please enter the amount of money you want to get: " <cin >> money;
while( money > ac -> Balance)
{
cout << "Your balance is not enough, please enter again" << endl;
cin >> money;
}
ac -> Balance = ac -> Balance - money;
}

float ATM::check_balance()
{
return ac -> Balance;
}

void ATM::tran()
{
account a[5];
string cn;
float m;
cout<<"please enter the cardnum of the account you want to transfer money to"<cin>>cn;
ifstream infile("atm.txt",ios::binary);
infile.seekg(0,ios::beg);
for(int i=0;i<5;i++)
{
infile.read((char *)(&a[i]),sizeof(a[i]));
}
for(int j=0;j<5;j++)
{
if(cn==a[i].CardNum)
{
cout<<"please enter the amount of money"<cin>>m;
while(m>ac->Balance)
{
cout<<"there is no enough money in your account,please enter again"<cin>>m;
}
ac->Balance=ac->Balance-m;
a[i].Balance=a[i].Balance+m;
ofstream outfile("atm.txt",ios::binary);
outfile.seekp(i*sizeof(a[0]),ios::beg);
outfile.write((char *) &a[i],sizeof(a[i]));
}
}
if(j>=5)
{
cout<<"the account doesn't exit"<}
}

void ATM::exit()
{
cout << "Please take your card!" << endl;
}

int main()
{
account a[5]={account("10001","1111",5000.0f),account("10002","2222",10000.0f),account("10003","3333",15000.0f),
account("10004","4444",20000.0f),account("10005","5555",25000.0f)};
account temp( "10001", "1111", 5000.0f );
ATM atm;
atm.load( &temp );
atm.welcome();
return 0;
}