Answer to Question #194262 in C++ for Ajith

Question

(Reusability using inheritance)

The postage for ordinary post is Rs. 2.00 for the first 15 grams and Rs. 1.00 for each additional 10 grams. Write a C++ program to calculate the charge of postage for a post weighting N grams. Read the weights of N packets and display the total amount of postage using multiple inheritance.

* Base class-1: Member variables are name, source and destination.

* Base class-2: Member variables are no. of packets and weight.

* Derived class: Member functions display(), displays the name, source, destination, total weight and total amount.

Answer 1

#include<bits/stdc++.h>
using namespace std;
class BaseClass1
{
public:
    string Name,source,destination;
};
class BaseClass2
{
public:
    int no_of_packets;
    float weight;
};
class Derived : public BaseClass1 , public BaseClass2
{
public:
    void display()
    {
        float total_weight;
        total_weight=no_of_packets*weight;
        cout<<"\nName : "<<Name;
        cout<<"\nSource : "<<source;
        cout<<"\nDestination : "<<destination;
        cout<<"\nTotal Weight : "<<total_weight;
        if(total_weight<=15)
        {
            cout<<"\nTotal Cost : Rs. 2";
        }
        else
        {
            if(total_weight>15)
            {
                total_weight=total_weight-15;
                int n=total_weight/10;
                if(n*10==total_weight)
                {
                    float cost=2+(n*1);
                    cout<<"\nTotal Cost : Rs. "<<cost;
                }
                else
                {
                    float cost=3+(n*1);
                    cout<<"\nTotal Cost : Rs. "<<cost;
                }
            }
        }
    }
};
int main()
{
    Derived d1;
    cout<<"Enter name ";
    getline(cin,d1.Name);
    cout<<"Enter Source ";
    getline(cin,d1.source);
    cout<<"Enter Destination ";
    getline(cin,d1.destination);
    cout<<"Enter number of packets ";
    cin>>d1.no_of_packets;
    cout<<"Enter weight of each packet ";
    cin>>d1.weight;
    d1.display();
}