void modify_account(int n)
{
int found=0;
fstream File;
File.open("account.dat",ios::binary|ios::in|ios::out);
if(!File)
{
cout<<"File could not be open !! Press any Key...";
return;
}
while(!File.eof() && found==0)
{
File.read((char*)&ac, sizeof(ac));
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((char*) &ac, sizeof(ac));
cout<<"\n\n\t Record Updated";
found=1;
}
}
File.close();
if(found==0)
cout<<"\n\n Record Not Found ";
}
void main()
{
char ch1,ch2;
while(1)
{
clrscr();
gotoxy(30,5);
cout<<"ABHISHEK TELECOM PVT. LTD.";
gotoxy(30,6);
cout<<"__________________________";
gotoxy(30,8);
cout<<"`M'anage Customer Records";
gotoxy(30,10);
cout<<"`D'isplay Customer List";
gotoxy(30,12);
cout<<"`G'enerate Bill";
gotoxy(30,14);
cout<<"`E'xit";
gotoxy(30,24);
cout<<"Enter your choice:";
ch1=getch();
ch1=toupper(ch1);
switch(ch1)
{
case('D'):
obj.display();
break;
case('G'):
obj.generate();
break;
case('E'):
clrscr();
exit(1);
break;
case('M'):
ch2='A';
do
{
clrscr();
gotoxy(30,5);
cout<<"ABHISHEK TELECOM PVT. LTD.";
gotoxy(30,6);
cout<<"__________________________";
gotoxy(30,8);
cout<<"`A'dd Customer Records";
gotoxy(30,10);
cout<<"`M'odify existing Records";
gotoxy(30,12);
cout<<"`D'elete existing record";
gotoxy(30,14);
cout<<"`E'xit";
gotoxy(30,24);
cout<<"Enter your choice:";
ch2=getch();
ch2=toupper(ch2);
switch(ch2)
{
case('A'):
obj.add();
break;
case('M'):
obj.modify();
break;
case('D'):
obj.del();
break;
case('E'):
break;
}//End of inner switch-case block
}while(ch2!='E');//End of do-while block
}//End of outer switch-case block
}//End of while block
}//End of main()