Lab4 Task2- Solution LAB ASSIGNMENT:

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1 Lab4 Task2- Solution LAB ASSIGNMENT: Write down a StudentAccount class having the following attributes and operations (methods) and save it as studacct.h file: Attributes: long studentid String studentname Double balance Operations: StudentAccount() : will prompt the user to enter all the relevant data from the keyboard StudentAccount() : Initialize the studentid, studentname and his account balance (will receive these data as parameters from the main() GetID() : will return the student ID to the main function GetName() : will return the student name to the main function GetBalance() : will return the current balance of the student to the main function Withdraw() : will take the amount as argument transferred from the main function and use the value to decrease the account (WILL WORK WHEN YOU WITHDRAW MONEY) If the balance of student is less than the withdraw amount do not let the student to withdraw money. Display an appropriate message. Deposit() : will take the amount as argument transferred from the main function and use the value to increase the account (WILL WORK WHEN YOU DEPOSIT MONEY) WriteAccount() : display the studentid, student name and current balance StudentAccount CLASS UML DIAGRAM : StudentAccount StudentID:long StudentName:string Balance:double StudentAccount() StudentAccount(sid:long,n:char *,bal:double) GetID():long GetName():char * GetBalance():double Withdraw (amount:double):void Deposit (amount:double):void WriteAccount():void 1) Write a main program to create 2 StudentAccount objects using pointers: Display all account details of both objects Then prompt for and input deposit amount for first object Update his account Then prompt for and input withdrawal amount for second object Update his account Display the ID and Name of first object Display the ID and current balance of first object Display all account details of second object

2 Display all account details of first object Task1 - Solution1 : //studentaccount.h class StudentAccount long studentid; double balance; char studentname[20]; public: StudentAccount() cout<<"\nenter Student Name : "; cin>>studentname; cout<<"\nenter Student ID No : "; cin>>studentid; cout<<"\nenter Student Account Balance : "; cin>>balance; StudentAccount(long std, double bal, char * n) studentid=std ; balance=bal; strcpy(studentname,n); long GetID() return studentid; char * GetName() return studentname; double GetBalance() return balance; void Withdraw ( double wit ) if(amount>balance) cout<<"insufficient balance!!!"; else balance -= wit ; void Deposit ( double dep ) balance += dep ; void WriteAccount() cout<<"\nstudent Name : "<<studentname; cout<<"\tid No : "<<studentid; cout<<"\taccount Balance : "<<balance; 2

3 3 ; Task1 - Solution 2: (This pointer) //studentaccount.h class studentaccount private: long studentid; string studentname; double balance; public: studentaccount() cout<<"enter student id : "; cin>>this->studentid; cout<<"enter student name : "; cin>>this->studentname; cout<<"enter student balance: "; cin>>this->balance; studentaccount(long studentid, string studentname, double balance) this->studentid = studentid; this->studentname = studentname; this->balance = balance; long getid() return this->studentid; string getname() return this->studentname; double getbalance() return this->balance; void withdraw(double amount) if(amount>balance) cout<<"insufficient balance!!!"; else this->balance -= amount;

4 4 ; void deposit(double amount) this->balance += amount; void writeaccount() cout<<"student Id: "<<this->studentid<<endl; cout<<"student Name:"<<this->studentName<<endl; cout<<"stundet Balance:"<<this->balance<<endl; //main ( ) for both solutions. #include "student.h" double b; studentaccount s1(964554, "Bilge Ercan",4500), *s1ptr; studentaccount s2(996547, "Pinar Sahin",2575), *s2ptr; s1ptr=&s1; s2ptr=&s2; cout<<"\naccount details Student 1:"; s1ptr->writeaccount(); cout<<"\naccount details of Student 2: "; s2ptr->writeaccount(); cout<<"\nenter deposit amount for Student2: "; cin >> b ; s2ptr->deposit ( b ) ; cout<<"\nenter withdrawal amount for Student 1 : "; cin >> b ; s1ptr->withdraw ( b ) ; cout<<"\nstudent ID No : "<<s1ptr->getid(); cout<<"\tname : "<<s1ptr->getname(); cout<<"\nstudent ID No : "<<s2ptr->getid(); cout<<"\tbalance : "<<s1ptr->getbalance(); cout<<"\naccount details of Student 1 : "<<endl; s1ptr->writeaccount(); cout<<"\naccount details of Student 2 : "<<endl; s2ptr->writeaccount(); system("pause");

5 5 Task2: Write a separate main program which will do the following: Create an array of 5 studentaccount objects using pointers. Display all the data members of the array object in an appropriate format. Task2 - Solution1: #include studentaccount.h studentaccount st[5]; studentaccount *stptr=st; cout<<"\n\ndata member values of all array of object elements :"; for ( int k=0;k<5;k++) stptr->writeaccount(); stptr++; system("pause"); Task2 - Solution2: #include studentaccount.h studentaccount st[5]; studentaccount *stptr=st; cout<<"\n\ndata member values of all array of object elements :"; for ( int k=0;k<5;k++) stptr[k].writeaccount(); system("pause"); Task2 - Solution 3:

6 6 #include studentaccount.h studentaccount stdarr[3]; studentaccount *obj1; obj1 = stdarr; for(int i=0;i<3;i++) (obj1+i)->writeaccount(); system( pause );