bank management project in C++,very easy to understand code

This is C++ project on bank account management

All basic functions to manage bank account are added using class named by ‘bank’

#include<iostream>

    #include<stdio.h>

    #include<conio.h>

using namespace std;

class bank

    {

     private:

     int ac_no,account;

     float balance;

     char name[20];

     public:

     void open();

     void deposite(int i);

     void withdraw(int p);

     void search(int b);

     void display();  };

    void bank::open()

{ cout<<"ENTER YOUR NAME :  ";

         cin>>name;

         cout<<"ENTER YOUR ACCOUNT NUMBER :  ";

         cin>>account;

         cout<<"ENTER THE AMOUNT OF MONEY : BDT  ";

         cin>>balance;

     }

          void bank::deposite(int j)

    {  int bnc;

          if(account==j)

       {

        cout<<"ENTER THE AMOUNT OF MONEY : BDT ";

        cin>>bnc;

        balance=balance+bnc;

        cout<<"\n\n\tJOB HAS DONE WELL !!! \n";

       }  }

    void bank::withdraw(int k)

    {   int blnc,p;

      if(account==k)

      {

        cout<<"YOUR CURRENT ACCOUNT BALANCE IS BDT "<<balance<<"\n"<<"THE AMOUNT OF MONEY YOU WANT TO WITHDRAW IS BDT ";

        cin>>blnc;

           p=balance-blnc;

           { if(p<0)

              cout<<"SORRY !!! THERE IS NOT ENOUGH MONEY IN YOUR ACCOUNT\n";

            else if(p>=0)

              {

                cout<<"\n\tYOUR REQUEST TO WITHDRAW MONEY HAS DONE\n\n";

                balance=p;

              }    }   }  }

    void bank::display(void)

    {    cout<<"\n\nNAME : "<<name<<"\n\nACCOUNT NO. "<<account<<"\n\nBALANCE : BDT "<<balance<<"\n\n";

    }

    void bank::search(int m)

    {

     if(account==m)

       {

         cout<<"\n\n*******Account Holder's INFO*******";

         cout<<"\n\nNAME : "<<name<<"\n\nACCOUNT NO. "<<account<<"\n\nBALANCE : BDT "<<balance<<"\n\n";

         cout<<"\n***************************************\n\n";

       }

    }

       void main()

       {

      int i,j,k,m,l,y=0;

         bank b[20];

        int index;

          do

        {

    cout<<"\a\nPRESS 1 TO OPEN ACCOUNT\n\n"<<"PRESS 2 TO DEPOSITE AMOUNT\n\n"<<"PRESS 3 TO WITHDRAW MONEY \n\n"<<"PRESS 4 TO DISPLAY \n\n"<<"PRESS 5 TO SEARCH \n\n"<<"PRESS 6 TO EXIT \n\n\t\n";

    cout<<"Your option......";

    cin>>index;

               switch(index)

            {

               case 1:

                 cout<<"\nHOW MANY ACCOUNT YOU WANT TO OPEN?\n"; //opening account

                 cin>>y;

                  for(i=0;i<y;i++)

                b[i].open();

               break;

              case 2:

                 cout<<"\nENTER YOUR ACCOUNT NO. ";             //deposite amount

                 cin>>j;

                 for(i=0;i<y;i++)

                  {

                    b[i].deposite(j);

                  }

              break;

              case 3:

                cout<<"\nENTER YOUR ACCOUNT NO. ";              //withdraw money

                cin>>k;

                for(i=0;i<y;i++)

                   {

                   b[i].withdraw(k);

                   }

                break;

              case 4:

                for(i=0;i<y;i++)

                  {                                             //display option

                  b[i].display();

                  }

                break;

              case 5:

                cout<<"\nENTER YOUR ACCOUNT NO. ";              //search option

                cin>>m;

                 for(i=0;i<y;i++)

                {

                b[i].search(m);

                }

                 break;

             case 6:

             break;

                default:cout<<"\nYOU HAVE PRESSED THE WRONG KEY. PLEASE TRY AGAIN. \n\n\n";

                break;

                                                   }}

                while(index!=6);

                                                                system("pause");}