Answer to Question #254299 in C++ for Fisiwe Shezi

Question

A bookshop gives discount to customers as follows:

 Students get 10% discount,

 Book dealers get 12% discount and

 Pensioners get 15% discount.

 All other customers get 10% discount only if their total purchases are more than R200.

You are requested to write two versions of a program that calculates and displays the final amount that is due, after

discount.

(i) The first version of the program uses a switch statement to implement the above program.

(ii) The second version of the program uses nested-if statements.

Answer 1

Source code

(i)

#include <iostream>


using namespace std;


int main()
{
    float total_purchase;
    float price;
    
    cout<<"\nEnter total purchase: ";
    cin>>total_purchase;
    int c;
    cout<<"\nChoose type of customer:\n1. Student\n2. Book dealer\n3. Pensioner\n4. Other\n";
    cin>>c;
    
    switch(c){
        case 1:
            price=total_purchase*0.90;
            break;
        case 2:
            price=total_purchase*0.88;
            break;
        case 3:
            price=total_purchase*0.85;
            break;
        case 4:
            if(total_purchase>200){
                price=total_purchase*0.90;
            }
            else{
               price=total_purchase; 
            }
            break;
        default:
            cout<<"\nInvalid choice";
    }
    cout<<"\nPrice after discount = "<<price;
    return 0;
}

(ii)

#include <iostream>


using namespace std;


int main()
{
    float total_purchase;
    float price;
    
    cout<<"\nEnter total purchase: ";
    cin>>total_purchase;
    int c;
    cout<<"\nChoose type of customer:\n1. Student\n2. Book dealer\n3. Pensioner\n4. Other\n";
    cin>>c;
    
    if (c==1)
        price=total_purchase*0.90;
    else if(c==2)
        price=total_purchase*0.88;
    else if(c==3)
        price=total_purchase*0.85;
    else if(c==4){
        if(total_purchase>200){
            price=total_purchase*0.90;
        }
        else{
           price=total_purchase; 
        }
    }
    else{
        cout<<"\nInvalid choice";
    }
    cout<<"\nPrice after discount = "<<price;
    return 0;
}

Sample run 1

Sample run 2