Calculate electricity charges - C++ Program

Q. Create a class for an electricity board that charges the following rates to users

a) For first 100 units : 40p per unit
b) For next 200 units : 50p per unit
c) Beyond 300 units   : 60p per unit

All users are charged a minimum of Rs.500. If the total cost is more than Rs.250.00 then an additional charges of 15% are added.

Write a C++ program using class to read the names of users & number of units consumed & print out the charges with names.

Answer:

#include<iostream>
using namespace std;

class Electric
{
        float unit;
        char name[20];
    public:
        void accept()
        {
                cout<<"\n Enter Name   : ";
                cin>>name;
                cout<<"\n No. Of Units : ";
                cin>>unit;
        }
        void print_bill();
};
void Electric::print_bill()
{
        int bill=0;
        if(unit>=100 && unit<=300)
                bill=(500+(unit*0.40));
        else if(unit>100 && unit<=300)
                bill=(500+(unit*0.40)+(unit*0.50));
        else if(unit>300)
                bill=(500+(unit*0.60));
        if(bill>250)
                bill=(bill+(bill*(15/100)));
        cout<<"\n Bill = "<<bill<<"\t"<<name;
}
int main()
{
        Electric e[10];
        int i,cnt;
        cout<<"\n Enter How Many Customers You Want? : ";
        cin>>cnt;
        for(i=0; i<cnt; i++)
                e[i].accept();
        for(i=0; i<cnt; i++)
                e[i].print_bill();
        return 0;
}


Output:

electricity bill
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