#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
#include <stdio.h>
#include <fstream.h>
class cus
{
public:
char name[20];
float blnc;
int ac_no;
void input();
};
void cus::input()
{
cout<<"\n\nname:";
cin>>name;
cout<<"\n\naccount no:";
cin>>ac_no;
cout<<"\n\n balance:";
cin>>blnc;
};
///////////////////////////////
class acc:public cus
{
public:
float intrst;
int tim;
void add();
void output();
acc();
};
acc::acc()
{
tim=0;
intrst=0;
}
void acc::output()
{
cout<<"\n\nname:"<<name;
cout<<"\n\n total balance:"<<blnc;
cout<<"\n\ninterest:"<<intrst;
}
void acc::add()
{
int i;
tim++;
cout<<"\n\n Amount:";
cin>>i;
intrst=intrst+blnc*tim*.07;
blnc=blnc+intrst+i;
};
class loan:public acc
{
public:
float lon;
loan()
{
lon=0;
}
void payloan();
void getloan();
};
void loan::getloan()
{
int l;
if(lon==0)
{
cout<<"Enter loan:";
cin>>l;
if(l<=(l*1.50))
{
cout<<"\n\n\tyou can get loan";
lon=l+l*0.1;
}
else
{
cout<<"\n \n\tSorry.";
lon=0;
}
}
else
cout<<"\n\n\tYou have previous loan.";
}
void loan::payloan()
{
int m;
if(lon==0)
cout<<"\n\n\t You have no loan.";
else
{
cout<<"\n\n\t You have to pay "<<lon;
cout<<"\n\nEnter your payment";
cin>>m;
lon=lon-m;
if(lon<=0)
{
cout<<"\n\n\tok your loan paid.";
lon=0;
}
else
cout<<"loan to be paid="<<lon;
}
}
void show()
{
loan a;
int i,found=0;
fstream file;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
file.seekg(0);
cout<<"\n\nInsert account no:";
cin>>i;
for(;;)
{
file.read((char*)&a,sizeof(a));
if(!file)
break;
if(i==a.ac_no)
{
a.output();
found=1;
break;
}
}
if(found!=1)
cout<<"\nNot exist.";
file.close();
getch();
};
void add_a()
{
loan a;
fstream file;
int i,k,found=0;
cout<<"\n\nInsertaccount no:";
cin>>i;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
file.seekg(0);
for(k=0;;k++)
{
file.read((char*)&a,sizeof(a));
if(!file)
break;
if(i==a.ac_no)
{
a.add();
found=1;
break;
}
}
if(found==1)
{
cout<<" K="<<k;
int d=sizeof(a);
cout<<"OBject="<<d;
int n=k*sizeof(a );
file.seekp(n);
file.write((char*)&a,sizeof(a));
cout<<"\n\n\tInformation added to file.";
file.close();
}
else
cout<<"\n\n\t This account is not exist in file.";
getch();
};
void dlt()
{
loan a[100];
fstream file;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
int i,l,found=0;
cout<<"\n\n insert account no:";
cin>>i;
file.seekg(0);
for(int k=0;;k++)
{
file.read((char*)&a[k],sizeof(a[k]));
if(!file)
break;
}
file.close();
file.open("final.text",ios::out|ios::binary);
for(l=0;l<k;l++)
{
if(i==a[l].ac_no)
{
cout<<"\n\n\t Record deleted.";
found=1;
}
else
file.write((char*)&a[l],sizeof(a[l]));
}
if(found==0)
cout<<"\n\n\t Record is not in file.";
file.close();
getch();
};
void loanf()
{
loan a;
fstream file;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
int i,found=0;
cout<<"\n\naccount no:";
cin>> i;
file.seekg(0);
for(int k=0;;k++)
{
file.read((char*)&a,sizeof(a));
if(!file)
break;
if(i==a.ac_no)
{
a.getloan();
int n=k*sizeof(a);
file.seekp(n);
file.write((char*)&a,sizeof(a));
found=1;
break;
}
}
file.close();
if(found==0)
cout<<"\n\n\t This account is not exist in file.";
getch();
};
void pay()
{
loan a;
fstream file;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
int i,found=0;
cout<<"Account no:";
cin>>i;
file.seekg(0);
for(int k=0;;k++)
{file.read((char*)&a,sizeof(a));
if(!file)
break;
if(i==a.ac_no)
{
a.payloan();
int n=k*sizeof(a);
file.seekp(n);
file.write((char*)&a,sizeof(a));
found=1;
break;
}
}
if(found==0)
{
cout<<"\n\n\t This account is not exist in file.";
}
file.close();
getch();
};
void inputdata(loan a)
{
fstream file;
file.open("final.text",ios::ate|ios::in|ios::out|ios::binary);
file.seekp(0,ios::end);
file.clear();
file.write((char*)&a,sizeof(a));
file.close();
}
/////////////MAIN PROGRAM//////////////////
int main()
{
int i;
for(;;)
{
loan a;
clrscr();
cout<<"\n\n\t<<<<<<<<<<<<<<<<<<MENU>>>>>>>>>>>>>>>>>>>>>>>>\n";
cout<<"________________________________________________\n";
cout<<"________________________________________________\n" ;
cout<<"^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n";
cout<<"\n\n\n\n\t 1.input. \n\n\t 2.output\n\n\t 3.Add\n\n\t 4.Delete\n\n\t 5.loan\n\n\t 6.pay\n\n\t7.Exit\n\n\t your choice:";
cin>>i;
switch(i)
{
case 1:a.input();inputdata(a);
break;
case 2:show();
break;
case 3:add_a();
break;
case 4:dlt();
break;
case 5:loanf();
break;
case 6:pay();
break;
default:exit(0);
}
}
// return 0;
}
///////////////////////////////////////////////////////////////////////////
Copy & paste this code in your TC & run, then you will get output.......
If you have any problem please comment below.........