Thread: helppp in bank databse

any one of u plz help me in my code actually my project is about bank database in oop .in this bank two accounts saving and current . in saving account their is interest but in current it is nt .the problem is that when i run the program and call current account and deposit or withdraw money the out put from which i m xpecting. means it take input but not show calculated money in current account.but if i call interest function in deposit and withdraw of current it properly works other wise nt .plz tell me where i m wrong.its urgent plzzzzzzzzz coz i have to submit it on monday

Code:

#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdlib.h>
#include<math.h>
#include<stdio.h>

const double interest=0.03;
const double Natural_E=2.712;
int acc_no[100];
static int a;
class bank{
	protected  :
		  char name[20],op;
		  int arr;
	protected:	  double balance;
		  double original;
		  double deposit_money;
		  double withdraw_money;
		  int years,t;
		  int n;
public:	   bank(){
		  name[0]='\0';
		  balance=0;
		  original=0;
		  deposit_money=0;
		  withdraw_money=0;
		  years=0;
		  a=0;
		  };

	   void instructions(){
		       cout<<"\n\t\t\t* ======================= *\n"
			     "\t\t\t*  Well come to           *\n"
			     "\t\t\t*           MFB           *\n"
			     "\t\t\t* ======================= *\n\n";
		       cout<<"\t\tThis bank will give you facility to open current\n"
			     "\t\t\t as well as saving account\n\n";
		       cout<<"\t\t\t   To proceed press enter";
		       getch();
		       };
	   void input_balance(){
		       cout<<"\t\tEnter the current balance on your account in PK.RS:";
		       cin>>balance;
		       original=balance;
		       };

	   void create(){
		       cout<<"\t\t\t     Enter your NAME:";
		       cin>>name;
		       cout<<"\n\t\t\t  **** Congratulation****\n";
		       cout<<"\t\t\t  You become a part of MFB\n";
		     if(a<100)
		     a++;
		     else
		     {
		     cout<<"Account number exceeds its limit!"<<endl;
		     getch();
		     return;
		     }
		     acc_no[a-1]=a;
		      cout<<"\t\t       your personal informations are\n\n";
		       cout<<"\t\t\t      Your NAME is:"<<name<<endl;
		       cout<<"\t\t\t    Your ACCOUNT no is:"<<a<<endl<<endl;
		       };
	   void deposit()
		       {
		       cout<<"\n\n\t\t\tWell come in your account:"<<name<<endl;
		       cout<<"\t\t\tHow much do you want to deposit:RS ";
		       cin>>deposit_money;
		       balance+=deposit_money;
		       cout<<"\t\t\tYour new balance after DEPOSIT is:RS "<<balance;

		       };
	   void withdraw()
		       {
			cout<<"\n\n\t\t\tWell come in your account:"<<name<<endl;
		       cout<<"\t\t\tHow much do you want to withdraw:RS ";
		       cin>>withdraw_money;
		       balance-=withdraw_money;
		       if(balance>0)
		       cout<<"\t\t\tYour new balance after WITHDRAW is:RS "<<balance;
		       else
		       cout<<"\t\t\tZERO balance in your account";
		       };
	   double interestpay(int years)
		  {
		       double temp,temp2;

		       temp=interest*years;
		       temp2=pow(Natural_E,temp);

		       return balance*temp2;
		  };
	   void numyears()
		     {
		     cout<<"\t\tHow many years have passed since the last transaction \n\t\t\t\tor starting this account: ";
		     cin>>years;
		     balance=interestpay(years);
		     cout<<"\n\n\t\t\tThe new balance after transction is:"<<balance;
		     getch();
		     }
};
//int bank::acc_no=0;
     class saving:public bank
     {
       public:
	  void create_s(){
		     clrscr();
		     cout<<"\n\t\t\t* ======================= *\n"
			   "\t\t\t*  Well come to           *\n"
			   "\t\t\t*     MFB saving account  *\n"
			   "\t\t\t* ======================= *\n";
		     cout<<"\t\t\t  This account gives you \n\t\tAn interest rate of";
		     cout<<interest*100<<"% compounded continuously\n\n";
		     bank::create();
		    cout<<"\t      DO you want to enter money into your account [Y/N]:";
		    cin>>op;
		    if(op=='y')
		    bank::input_balance();
		     };
	  void swithdraw(){
		       cout<<"\t\t    Enter your Account No to deposit:";
		       cin>>arr;
		       int flag=0;
		       for(int i=0; i<a; i++)
		       {
			       if(arr==acc_no[i])
			       {
			       flag=1;
			       bank::withdraw();
				cout<<"\n\n\t\tDo you want to check interest added into your account [Y/N]: ";
				cin>>op;

				if(op=='y')
			      numyears();
			       }
		       }
		       if(flag==0)
		       cout<<"\n\t\tAccount doesn't exist!!\n\n";



		       };

	  void sdeposit(){
		     cout<<"Enter your Account No to deposit:";
		     cin>>arr;
		  //    t= arr-acc_no;
			int flag=0;
		       for(int i=0; i<a; i++)
		       {
				if(arr==acc_no[i])
			       {      flag=1;
				      bank::deposit();
				       cout<<"\n\nDo you want to check interest added into your account [Y/N]:";
					cin>>op;
				       if(op=='y')
					      numyears();
						 }
			       //else
				//
		       }
		       if(flag==0)
		       cout<<"\nAccount doesn't exist!!\n\n";
		};
       };

     class current_acc:public bank
       {

       public:
	  void create_c(){
	  clrscr();
		     cout<<"\n\t\t\t* ======================= *\n"
			   "\t\t\t*  Well come to           *\n"
			   "\t\t\t*     MFB current account *\n"
			   "\t\t\t* ======================= *\n";
		     cout<<"\n\t\t   This account is for business peoples \n\t\t   Their is no interest in this account\n\n";
		     bank::create();
		      cout<<"\t      DO you want to enter money into your account [Y/N]:";
		    cin>>op;
		    if(op=='y')
		    bank::input_balance();
		     };
	  void cdeposit(){
		   cout<<"\t\t    Enter your Account No to deposit:";
		     cin>>arr;
		       int flag=0;
		       for(int i=0; i<a; i++)
		       {
			       if(arr==acc_no[i])
			       {
			       flag=1;

				 bank::deposit();
				 cout<<"congratz";
				    /*   cout<<"\n\nDo you want to check interest added into your account [Y/N]:";
					cin>>op;
				       if(op=='y')
					      numyears(); */

			       }
		       }
		       if(flag==0)
		       cout<<"\n\t\tAccount doesn't exist!!\n\n";
	};


	  void cwithdraw(){
		   cout<<"\t\t    Enter your Account No to deposit:";
		     cin>>arr;
		       int flag=0;
		       for(int i=0; i<a; i++)
		       {
			       if(arr==acc_no[i])
			       {
			       flag=1;
				  bank::withdraw();
				  /*     cout<<"\n\nDo you want to check interest added into your account [Y/N]:";
					cin>>op;
				       if(op=='y')
					     numyears();  */
			       }
		       }
		       if(flag==0)
		       cout<<"\n\t\tAccount doesn't exist!!\n\n";
			  };
       };

main()
{
clrscr();
int z;
saving s;
current_acc c;
char op,nm[20],str[20];;
bank b1[100],b2;
b2.instructions();

for(int i=0;i<100;)
       {     clrscr();
	     cout<<"\n\t\t\t1.   Press c to CREATE ACCOUNT\n"
		   "\t\t\t2.   Press d to DEPOSIT\n"
		   "\t\t\t3.   w to WITHDRAW\n"
		    "\t\t\t4.   q to QUIT\n";
	     cin>>op;
       switch(op)
	      {
		case'c':
		clrscr();
		    cout<<"\n\n\tyou pressed c\n";
		    cout<<"\tWhich account do u want to create\n";
		    cout<<"\tCurrent or saving\n";
		    cout<<"\tTo create saving account press 'saving'\n"
			  "\tTo create current press 'current':";
		    gets(str);
		    int m=strcmp(str,"current");
		    if(m==0)
			c.create_c();
		    else
			 s.create_s();
		    break;
		case'd':
		    clrscr();
		    cout<<"\t\t  In which account do you want to deposit:";
		    gets(str);
		    m=strcmp(str,"current");

			if(m==0)
			c.cdeposit();
			else
			s.sdeposit();
		    break;
		case'w':
		    cout<<"\tFrom which account do you want to withdraw:";
		    gets(str);
		    m=strcmp(str,"current");

			if(m==0)
			  c.cwithdraw();
			else
			  s.swithdraw();
		    break;

		case'q':
		    cout<<"\n\tyou pressed q";
		    if(op=='q')
		    {
		    exit(0);
		    }
		    break;
		default:
		    cout<<"unknown";
	      }
       i++;
       }
getch();
}