Detailed analysis of the ATM simulation program compiled by C

//************************************

//**

// * Function. H *

//**

//************************************

# Include <iostream. h>

Class consumer;

Class ATM

// ATM

{

Public:

ATM (Consumer & CN): CNSM (CN)

{

}

Void welcome ();

// Login interface

Bool check_passwd (char N [], char PWD []);

// Check the password

Void change_passwd ();

// Change the password

Void fetchmoney ();

// Withdraw money

Void information ();

// Query information

Void exitatm ();

// Exit the system

Void functionshow ();

// Functional interface

Void lock ();

// Lock the machine

PRIVATE:

Int times;

// Record Password Input times

Consumer & CNSM;

};

Class consumer

// User

{

Public:

Friend class ATM;

Consumer (char name [], char num [],

Float money, char password []);

Protected:

Char * get_name ();

// Get the name

Char * get_num ();

// Get the card number

Char * get_passwd ();

// Obtain the password

Float get_money ();

// Obtain the balance

Void set_passwd (char PWD []);

// Set the password

Void set_money (float m );

// Get the money

PRIVATE:

Char passwd [8];

// User Password

Char name [20];

// User Name

Char num [20];

Float money;

};
//************************************

//**

// * Consumer class member functions *

//**

//************************************

# Include "function. H"

# Include <string. h>

Consumer: Consumer (char name [],

Char num [], float money, char password [])

{

Strcpy (name, name );

Strcpy (Num, num );

Money = money;

Strcpy (passwd, password );

}

Float consumer: get_money ()

{

Return money;

}

Char * Consumer: get_name ()

{

Return name;

}

Char * Consumer: get_num ()

{

Return num;

}

Char * Consumer: get_passwd ()

{

Return passwd;

}

Void consumer: set_money (float m)

{

Money-= m;

}

Void consumer: set_passwd (char PWD [])

{

Strcpy (passwd, PWD );

}

//************************************

//**

// * Member functions of the ATM class *

//**

//************************************

# Include "function. H"

# Include <string. h>

# Include <stdlib. h>

Void ATM: Welcome ()

{

Times = 0;

Cout <"$

Thank you !~!

"<Endl;

Char PWD [8], num [20], ch;

Int I = 0;

Do

{

I = 0;

Cout <Endl <"Enter the card number :";

Do

{

Cin. Get (CH );

Num [I] = CH;

} While (Ch! = '/N ');

Num[ I-1] = '/0 ';

I = 0;

Cout <"enter the password :";

Do

{

Cin. Get (CH );

PWD [I] = CH;

} While (Ch! = '/N ');

PWD [I-1] = '/0 ';

If (! Check_passwd (Num, PWD ))

{

Cout <"the card number or password you entered is incorrect,

Enter "<Endl;

Times;

}

Else

{

Functionshow ();

}

} While (Times <3 );

Lock ();

}

Bool ATM: check_passwd (char num [],

Char PWD [])

{

If (strcmp (Num, CNSM. get_num () = 0 & strcmp

(PWD, CNSM. get_passwd () = 0)

Return true;

Else

Return false;

}

Void ATM: functionshow ()

{

Int N;

Do

{

Cout <Endl <"Enter the corresponding operation serial number for the operation:

"<Endl;

Cout <"1) Change Password" <Endl

<"2) Withdrawal" <Endl

<"3) Querying balances" <Endl

<"4) withdraw from the system" <Endl;

Cout <"$> //";

Cin> N;

While (n <1 | n> 4)

{

Cout <"enter the correct operation number! "<Endl;

Cout <"$> //";

Cin> N;

}

Switch (N)

{

Case 1: change_passwd ();

Break;

Case 2: fetchmoney ();

Break;

Case 3: Information ();

Break;

Case 4: exitatm ();

Break;

}

} While (true );

}

Void ATM: change_passwd ()

{

Char PWD [8], repwd [8];

Times = 0;

Do

{

Cout <Endl <"Enter the old password :";

Cin> pwd;

If (! Check_passwd (CNSM. get_num (), PWD ))

Times;

Else

Break;

} While (Times <3 );

If (Times = 3)

Lock ();

Int T = 0;

Do

{

Cout <"Enter the new password :";

Cin> pwd;

Cout <"Enter the new password again :";

Cin> repwd;

If (t = strcmp (PWD, repwd ))! = 0)

Cout <"the two passwords you entered are different,

Enter again! "<Endl;

} While (T! = 0 );

CNSM. set_passwd (PWD );

Cout <"the password is successfully modified. Please remember! "<Endl;

}

Void ATM: fetchmoney ()

{

Float m;

Char ch;

Do

{

Cout <Endl <"How much do you need :"

<"/N ___ fckpd ___ 2gt; //" <Endl;

Cin> m;

While (M <= 0)

{

Cout <"enter the correct number! "<Endl;

Cout <"$> //";

Cin> m;

}

If (CNSM. get_money ()-M <0)

{

Cout <"sorry, your balance is insufficient! "

<Endl;

}

Else

{

Cout <Endl <"operation successful. Please collect the money! "

<Endl;

CNSM. set_money (m );

}

Cout <"whether to continue this operation: (y/n )"

<Endl;

Cout <"$> //";

Cin> CH;

While (Ch! = 'N' & Ch! = 'N' & Ch! = 'Y' & Ch! = 'Y ')

{

Cout <"$> //";

Cin> CH;

}

} While (CH = 'y' | CH = 'y ');

}

Void ATM: Information ()

{

Cout <"*********************************" <<Endl;

Cout <"*" <Endl;

Cout <"* User name:" <CNSM. get_name () <Endl;

Cout <"* card number:" <CNSM. get_num () <Endl;

Cout <"* Balance:" <CNSM. get_money () <Endl;

Cout <"*********************************" <<Endl;

}

Void ATM: Lock ()

{

Cout <Endl <"sorry, your operation is incorrect,

Your card has been confiscated! "<Endl;

Exit (1 );

}

Void ATM: exitatm ()

{

Cout <Endl <"thank you for your support for this bank,

Welcome to the next visit! "<Endl;

Cout <"get the card ...... "<Endl;

Exit (0 );

}
//************************************

//**

// * ATM. cpp *

//**

//************************************

# Include <iostream. h>

# Include "function. H"

Void main ()

{

Consumer C1 ("Jim", "12345", 5200.3f, "123 ");

// Construct a user first

ATM (C1 );

ATM. Welcome ();

}