Class and Sequence Diagram for ATM

This document presents a solution to a practical assignment involving the creation of class and sequence diagrams for an ATM system. The class diagram outlines the structure of the 'Account' and 'AccountData' classes, including their attributes and operations. The sequence diagram illustrates the flow of interactions for a specific sequence of operations: OPEN, LOGIN, PIN, DEPOSIT, BALANCE, suspend, and close. The solution provides a detailed view of how the system transitions between states and how data is managed during these operations.

Class Diagram

Class Account:
S// point to current state
LS[0] // point to start state
LS[1] // point to idle state
LS[2] // point to ready state
Operations:
create(){
S->create()
currState = S.getID()
IF currState == 0 THEN
S = LS[1] //change ATM state from “Start” to “Idle”
ENDIF
}
Open(int p, int y, int a){
If(currState == 1) then
AccountData ad = new AccountData(p,y,a,”active”);
End if
}
Pin(int pin){
IF( currState = 1 && pin == ad.getPint())
Set S = LS[2];
END IF
}
Deposit(int d){
IF(currState = 2 )
Ad.deposit(d);

End IF
}
Withdraw(int y){
IF(currState = 2 )
Ad.withdraw(y);
End IF
}
Balance(){
IF(currState = 2 )
Return ad.balance();
}
Logout(){
IF(currState = 2 )
S = LS[1];
End IF
}
Suspend(){
IF(currState = 2 )
Ad.setAccountStatus(“suspend”);
End IF

}
activated(){
IF(currState = 2 )
Ad.setAccountStatus(“activated”);
End IF
}
Close(){
IF(currState = 2 )
S = LS[1];
End IF
}
Class AccountData:
setPin(int pincode){
pin = pincode;
}
Deposit(int d){
Balance = balance + d;
}
withdraw(int w){

Balance = balance - w;
}
Balance(){
Return balance;
}
setAccountStatus(String status){
accountStatus = status;
}
Sequence Diagram
Provide a sequence diagram for the following operation sequence:
OPEN(123,111,1000), LOGIN(111), PIN(123), DEPOSIT(200), BALANCE(),
suspend(), close.