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C++ Program To Implement Bank Management System.

#include<iostream>
#include<fstream>
#include<cctype>
#include<iomanip>
#include <cstdlib>
using namespace std;

class account {
int acno;
char name[50];
int deposit;
char type;

public:
void create_account(); //function to get data from user
void show_account() const; //function to show data on screen
void modify(); //function to add new data
void dep(int); //function to accept amount and add to balance amount
void draw(int); //function to accept amount and subtract from balance amount
void report() const; //function to show data in tabular format
int retacno() const; //function to return account number
int retdeposit() const; //function to return balance amount
char rettype() const;  //function to return type of account
};

void account::create_account() {
cout<<"\nEnter The Account No. : ";
cin>>acno;
cout<<"\n\nEnter The Name Of The Account Holder : ";
cin.ignore();
cin.getline(name,50);

cout<<"\nEnter Type Of The Account (C/S) : ";
cin>>type;
type=toupper(type);
cout<<"\nEnter The Initial amount(>=500 for Saving and >=1000 for current ) : ";
cin>>deposit;
cout<<"\n\n\nAccount Created..";
}

void account::show_account() const {
cout<<"\nAccount No. : "<<acno;
cout<<"\nAccount Holder Name : ";

cout<<name;
cout<<"\nType of Account : "<<type;
cout<<"\nBalance Amount : "<<deposit;
}

void account::modify() {
cout<<"\nAccount No. : "<<acno;
cout<<"\nModify Account Holder Name : ";
cin.ignore();
cin.getline(name,50);

cout<<"\nModify Type Of Account : ";
cin>>type;
type=toupper(type);
cout<<"\nModify Balance Amount : ";
cin>>deposit;
}

void account::dep(int x) {
deposit+=x;
}
void account::draw(int x) {
deposit-=x;
}
void account::report() const {
cout<<acno<<setw(10)<<" "<<name<<setw(10)<<" "<<type<<setw(6)<<deposit<<endl;
}
int account::retacno() const {
return acno;
}
int account::retdeposit() const {
return deposit;
}
char account::rettype() const {
return type;
}

void write_account();      //function to write record in binary file
void display_sp(int);       //function to display account details given by user
void modify_account(int);         //function to modify record of file
void delete_account(int); //function to delete record of file
void display_all();           //function to display all account details
void deposit_withdraw(int, int); // function to deposit/withdraw balance
void intro(); //introductory screen function

int main() {
char ch;
int num;
intro();

do {
system("cls");
cout<<"\n\n\n\tMAIN MENU";
cout<<"\n\n\t01. NEW ACCOUNT";
cout<<"\n\n\t02. DEPOSIT AMOUNT";
cout<<"\n\n\t03. WITHDRAW AMOUNT";
cout<<"\n\n\t04. BALANCE ENQUIRY";
cout<<"\n\n\t05. ALL ACCOUNT HOLDER LIST";
cout<<"\n\n\t06. CLOSE AN ACCOUNT";
cout<<"\n\n\t07. MODIFY AN ACCOUNT";
cout<<"\n\n\t08. EXIT";
cout<<"\n\n\tSelect Your Option (1-8) : ";
cin>>ch;

switch(ch) {
case '1':
write_account();
break;

case '2':
cout<<"\n\n\tEnter The Account No. : "; cin>>num;
deposit_withdraw(num, 1);
break;

case '3':
cout<<"\n\n\tEnter The Account No. : "; cin>>num;
deposit_withdraw(num, 2);
break;

case '4':
cout<<"\n\n\tEnter The Account No. : "; cin>>num;
display_sp(num);
break;

case '5':
display_all();
break;

case '6':
cout<<"\n\n\tEnter The Account No. : "; cin>>num;
delete_account(num);
break;

case '7':
cout<<"\n\n\tEnter The Account No. : "; cin>>num;
modify_account(num);
break;

case '8':
cout<<"\n\n\tThanks For Using Bank Management system";
break;

default :cout<<"\a";
}

cin.ignore();
cin.get();
}while(ch!='8');
return 0;
}

void write_account() {
account ac;
ofstream outFile;

outFile.open("account.dat",ios::binary|ios::app);
ac.create_account();
outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
outFile.close();
}

void display_sp(int n) {
account ac;
bool flag=false;

ifstream inFile;
inFile.open("account.dat",ios::binary);

if(!inFile) {
cout<<"\n\n\tFile could not be open !! Press any Key...";
return;
}
cout<<"\nBALANCE DETAILS\n";

while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account))) {
if(ac.retacno()==n) {
ac.show_account();
flag=true;
}}

inFile.close();
if(flag==false)
cout<<"\n\n\tAccount Number Does Not Exist ..";
}

void modify_account(int n) {
bool found=false;
account ac;

fstream File;
File.open("account.dat",ios::binary|ios::in|ios::out);

if(!File) {
cout<<"\n\n\tFile Could Not Be Open !! Press Any Key...";
return;
}

while(!File.eof() && found==false) {
File.read(reinterpret_cast<char *> (&ac), sizeof(account));

if(ac.retacno()==n) {
ac.show_account();
cout<<"\n\nEnter The New Details of account : "<<endl;

ac.modify();
int pos=(-1)*static_cast<int>(sizeof(account));
File.seekp(pos,ios::cur);

File.write(reinterpret_cast<char *> (&ac), sizeof(account));
cout<<"\n\n\tRecord Updated ..";
found=true;
}}

File.close();
if(found==false)
cout<<"\n\n\tRecord Not Found ..";
}

void delete_account(int n) {
account ac;
ifstream inFile;
ofstream outFile;

inFile.open("account.dat",ios::binary);
if(!inFile) {
cout<<"\n\n\tFile Could Not Be Open !! Press Any Key...";
return;
}

outFile.open("Temp.dat",ios::binary);
inFile.seekg(0,ios::beg);
while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account))) {

if(ac.retacno()!=n) {
outFile.write(reinterpret_cast<char *> (&ac), sizeof(account));
}}

inFile.close();
outFile.close();
remove("account.dat");
rename("Temp.dat","account.dat");
cout<<"\n\n\tRecord Deleted ..";
}

void display_all() {
account ac;
ifstream inFile;
inFile.open("account.dat",ios::binary);

if(!inFile) {
cout<<"\n\n\tFile could Not Be Open !! Press Any Key...";
return;
}

cout<<"\n\n\t\tACCOUNT HOLDER LIST\n\n";
cout<<"====================================================\n";
cout<<"A/c no.      NAME           Type  Balance\n";
cout<<"====================================================\n";

while(inFile.read(reinterpret_cast<char *> (&ac), sizeof(account))) {
ac.report();
}
inFile.close();
}

void deposit_withdraw(int n, int option) {
int amt;
bool found=false;

account ac;
fstream File;
File.open("account.dat", ios::binary|ios::in|ios::out);

if(!File) {
cout<<"\n\n\tFile Could Not Be Open !! Press Any Key...";
return;
}

while(!File.eof() && found==false) {
File.read(reinterpret_cast<char *> (&ac), sizeof(account));

if(ac.retacno()==n) {
ac.show_account();

if(option==1) {
cout<<"\n\n\tTO DEPOSITE AMOUNT ";
cout<<"\n\nEnter The Amount To Be Deposited : ";
cin>>amt;
ac.dep(amt);
}

if(option==2) {
cout<<"\n\n\tTO WITHDRAW AMOUNT ";
cout<<"\n\nEnter The Amount To Be Withdraw : ";
cin>>amt;

int bal=ac.retdeposit()-amt;

if((bal<500 && ac.rettype()=='S') || (bal<1000 && ac.rettype()=='C'))
cout<<"\n\n\tInsufficient Balance ..";
else
ac.draw(amt);
}

int pos=(-1)*static_cast<int>(sizeof(ac));
File.seekp(pos,ios::cur);
File.write(reinterpret_cast<char *> (&ac), sizeof(account));
cout<<"\n\n\tRecord Updated ..";
found=true;
}}

File.close();
if(found==false)
cout<<"\n\n\tRecord Not Found ..";
}

void intro() {
cout<<"\t*** BANK MANAGEMENT SYSTEM *** ";
cout<<"\n\n\n\tMADE BY : Mohammad A M Bhuiyan";
cout<<"\n\n\tSCHOOL : CSU Northridge ";
cin.get();
}
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