Page 70 - C++

Amount can be calculated accordingto the following conditions:

No_of_units Cost

First 50 units Free
Next 100 units 0.80 @ unit
Next 200 units 1.00 @ unit
Remaining units 1.20 @ unit

Public members:

* A function Accept( ) which allows user to enter Cname,
Pnumber, No_of_units and invoke function Calc_Amount().
* A function Display( ) to display the values of all the data members
on the screen.

Ans.
class Ele_Bill
{
char Cname[20];
long Pnumber;
int No_of_units;
float Amount;
void Calc_Amount( );
public:
void Accept();
void Display();
};

void Ele_Bill : : Calc_Amount( )
{
if(No_of_units<=50)
{
Amount=0;
}
else if(No_of_units<=150)
{
Amount=(No_of_units-50)*0.80;
}
else if(No_of_units<=350)
{
Amount=80+(No_of_units-150)*1.00;
}
else
{
Amount=80+200+(No_of_units-350)*1.20;
}
}
void Ele_Bill :: Accept( )

6