The program save some funny thing

After deposit, the program will save the changes of balance, but the saved thing is some funny thing. How to solve the problem?

The funny thing that display on screen:
$4.25248e-311

Code:

case 'D':
			acctType=men.typeMenu();
			if(acctType=='C')
			{
				int acNo,found=0,i;
				double bal1,bal2;
				system("cls");
				r.open("checking.txt");
				cout<<"\nDeposit into checking account";
				cout<<"\nEnter your checking account number: ";
				cin>>acNo;
				i=-1;
				while(!r.eof())
				{
					i=i+1;
					r.read((char*)(&che[i]),sizeof(che[i]));
					if(acNo==che[i].getacctNum())
					{	
						bal1=che[i].getBal();
						che[i].deposit();
						bal2=che[i].getBal();
						tra[n].setTran(acNo,d,m,y,h,t,"Checking","Deposit","Success",bal1,bal2);
						w.open("transaction.txt",ios::app,ios::ate);
						w.write((char*)(&tra[n]),sizeof(tra[n]));
						w.close();
						found=1;
					}
				}
				r.close();
				w.open("checking.txt");
				for(int c=0;c<i;c=c+1)
					w.write((char*)(&che[c]),sizeof(che[c]));
				w.close();
				if(found==0)
				{
					cout<<"\nSorry, no such account.";
				}
				cout<<"\n\nPress ENTER to continue...";
				while(!cin.get()){};
				while(!cin.get()){};				
				break;
			}
			if(acctType=='S')
			{
				int acNo,found=0,i;
				double bal1,bal2;
				system("cls");
				r.open("saving.txt");
				cout<<"\nDeposit into saving account";
				cout<<"\nEnter your saving account number: ";
				cin>>acNo;
				i=-1;
				while(!r.eof())
				{
					i=i+1;
					r.read((char*)(&sav[i]),sizeof(sav[i]));
					if(acNo==sav[i].getacctNum())
					{	
						bal1=sav[i].getBal();
						sav[i].deposit();
						bal2=sav[i].getBal();
						tra[n].setTran(acNo,d,m,y,h,t,"Saving","Deposit","Success",bal1,bal2);
						w.open("transaction.txt",ios::app,ios::ate);
						w.write((char*)(&tra[n]),sizeof(tra[n]));
						w.close();
						found=1;
					}
				}
				r.close();
				w.open("saving.txt");
				for(int c=0;c<i;c=c+1)
					w.write((char*)(&sav[c]),sizeof(sav[c]));
				w.close();
				if(found==0)
				{
					cout<<"\nSorry, no such account.";
				}
				cout<<"\n\nPress ENTER to continue...";
				while(!cin.get()){};
				while(!cin.get()){};				
				break;
			}
			else
			{
				cout<<"Invalid type";
				cout<<"\n\nPress ENTER to continue...";
				while(!cin.get()){};
				while(!cin.get()){};
			}
			break;

you need to set your output flags before any cout is made. I cant remember them exactly as i have not had to use them in a while, and my older c++ programs r missing...

Code:

#include <math>

Code:

cout << setiosflags << ios::setprecision(2) << ios::right;

(think im missing one)

and change your tabs to 4 spaces so your code doesn't horizontally scroll 2 screens

similar to what RoD said:

Code:

#include <iomanip>

...

std::cout<<setiosflags(ios::fixed|ios::showpoint|ios::right)<<setprecision(2);

fixed: forces teh decimal
showpoint: shows trailing zeroes
right: right aligns (so the decimals line up)
setprecision: number of decimal points to round to