Answer to Question #254297 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

#include <iostream>
using namespace std;
int main()
{
 // Part I
 double sum;
 char ch;
 cout << "Enter type of discount (S, D, P, O): ";
 cin >> ch;
 cout << "Enter sum of purchases: ";
 cin >> sum;
 switch (ch)
 {
 case 'S':
 {
 cout << "Sum with discount is: R" << sum * 0.9 << endl;
 break;
 }
 case 'D':
 {
 cout << "Sum with discount is: R" << sum * 0.88 << endl;
 break;
 }
 case 'P':
 {
 cout << "Sum with discount is: R" << sum * 0.85 << endl;
 break;
 }
 case 'O':
 {
 if (sum > 200) cout << "Sum with discount is: R" << sum * 0.9 << endl;
 else cout << "Sum with discount is: R" << sum << endl;
 break;
 }
 default:
 cout << "Wrong value!" << endl;
 break;
 }
 cout << endl;
 cout << "Enter type of discount (S, D, P, O): ";
 cin >> ch;
 cout << "Enter sum of purchases: ";
 cin >> sum;
 if (ch == 'S') cout << "Sum with discount is: R" << sum * 0.9 << endl;
 else if (ch == 'D') cout << "Sum with discount is: R" << sum * 0.88 << endl;
 else if (ch == 'P') cout << "Sum with discount is: R" << sum * 0.85 << endl;
 else if (ch == 'O')
 {
 if (sum > 200) cout << "Sum with discount is: R" << sum * 0.9 << endl;
 else cout << "Sum with discount is: R" << sum << endl;
 }
 else cout << "Wrong value!" << endl;
 return 0;
}