Question

Part II – Cost Calculator (15 Points)

A software company sells a package that retails for $ 99. Quantity discounts are given according to the following table:

Quantity	Discount
10 to 19	20%
20 to 49	30%
50 to 99	40%
100 or more	50%

Write a program that asks the user to enter the number of packages purchased. The program should then display the discount percentage, amount of the discount (can be 0) and the total amount of the purchase after the discount. Format the output to two decimal places, include % sign after the discount percentage and $ before the discount amount & total amount. Your program should include the following functions:

1. discount_percentage – This function will receive number of packages purchased as a parameter and will return the discount percentage.
2. main – This function will perform the following tasks:
   1. Ask use for the quantity
   2. Use discount_percentage function to calculate the discount percentage
   3. Calculate amount (quantity * 99)
   4. Calculate discount amount (amount * discount percentage /100)
   5. Calculate total amount (amount – discount amount)
   6. Display discount percentage, amount of discount, and total amount
   7. Display an error message if quantity is less than 0 (negative number)
   8. Use try/except construct to catch any errors
3. Click Run -> Run Module
4. Type main() to run your program
5. If there are any syntax errors then fix those errors and run your program again.
6. Use the quantity given in the following table to test your program for different possible outcomes.
7. If you get the correct results (shown in the last three columns) then your program is working as expected.

   Run Number	Quantity	Output
   		Discount Percentage	Discount Amount	Total Amount
   1	abc	Display Error Message
   2	-5	Display Error Message
   3	5	0.00%	$0.00	$495.00
   4	19	20.00%	$376.20	$1504.80
   5	55	40.00%	$2178.00	$3267.00
   6	105	50%	$5197.50	$5197.50

   Once you are satisfied with your results then take a screen shot of run number 1, 3 and 6 and past them below.Paste your screen shot below this line

Answer 1

PROGRAM

//-----------------------------------------//

//Program to calculate discount

//-----------------------------------------//

//include header files

#include<iostream>

#include<iomanip>

//include std namespace

using namespace std;

//--------------------------------------

//Function to find and return discount rate

//Input: number of packages

//Output: Discount rate

//Side Effects: None

//--------------------------------------

float discount_percentage(int p)

{

    if(p>=100) return 50.0;

    if(p>=50) return 40.0;

    if(p>=30) return 30.0;

    if(p>=20) return 20.0;

    return 0;

}

//main function

int main(void)

{

    int packages; //holds number of packages

    float amount, //holds total amount

          discountAmt,//holds discount amount

          discountPercentage; //holds discount percentage

    char c; //temporary variable

    //repeat until user opt to stop

    do{

        //read quantity from user

        cout<<endl<<"Enter the number of packages purchased: ";

        //handle data exception

        try

        {

            cin>>packages;

            if(packages < 1)throw(packages);

        }

        catch(int packages)

        {

            cout<<endl<<"Invalid input. \nQuantity must be a whole number greater than 0\n\n";

            return 0;

        }

        //calculate and display the results

        discountPercentage = discount_percentage(packages);

        discountAmt = packages*99*discountPercentage/100.0;

        amount = packages*99 - discountAmt;

        cout<<fixed<<setprecision(2);

        cout<<"Discount percentage = "<< discountPercentage <<" %"

            <<endl<<"Amount of discount = "<<"$ "<< discountAmt<<" and"

            <<endl<<"Total amount = "<<amount;

        cout<<endl<<endl<<"Calculate more (y/n): ";

        cin>>c;

    }

    while(c=='y'||c=='Y');

}

SCREENSHOT OF PROGRAM

1 // -// //Program to calculate discount 3 // -- -// 4 5 //include header files 6 7 #include<iostream> 8 #include<iomanip> 9 10 //include std namespace 11 12 using namespace std; 13 14 // ----- 15 //Function to find and return discount rate 16 //Input: number of packages 17 //Output: Discount rate 18 //Side Effects: None 19 // ---- 20 float discount_percentage (int p 21 { 22 if(p>=100) return 50.0; 23 if(p>=50) return 40.0; 24 if (p>=30) return 30.0; 25 if (p>=20) return 20.0; 26 return 0; 27 } 28 29 //main function 30 31 int main(void) 32 { 33 int packages; //holds number of packages 34 float amount, //holds total amount 35 discountAmt,//holds discount amount 36 discount Percentage; //holds discount percentage 37 char c; //temporary variable 38 39 //repeat until user opt to stop 40 41 do { 42 //read quantity from user 43 44 cout<<endl<<"Enter the number of packages purchased: "; 45 46 //handle data exception 47 48 try 49 { 50 cin>>packages; 51 if (packages < 1) throw packages); 52 } 53 54 catch(int packages) 55 { 56 cout<<endl<<"Invalid input. \nQuantity must be a whole number greater than 0\n\n"; 57 return 0; 58 59 60 //calculate and display the results 61 discountPercentage = discount_percentage (packages); 62 discountAmt = packages*99* discount Percentage/100.0; 63 amount = packages*99 discountAmt; 64 cout<<fixed<<setprecision (2); 65 cout<<"Discount percentage = "<< discount Percentage <<"

66 67 68 69 70 71 72 <<endl<< "Amount of discount = "<<"$"<< discountAmt<<" and" <<endl<<"Total amount = "<<amount; cout<<endl<<endl<<"Calculate more (y/n): "; cin>>c; while (c=='y'||C=='Y'); }

OUT OF THE PROGRAM IN CODE::BLOCK

Enter the number of packages purchased: aaa

Invalid input.

Quantity must be a whole number greater than 0

Enter the number of packages purchased: -5

Invalid input.

Quantity must be a whole number greater than 0

Enter the number of packages purchased: 5

Discount percentage = 0.00 %

Amount of discount = $ 0.00 and

Total amount = 495.00

Calculate more (y/n): y

Enter the number of packages purchased: 19

Discount percentage = 0.00 %

Amount of discount = $ 0.00 and

Total amount = 1881.00

Calculate more (y/n): y

Enter the number of packages purchased: 55

Discount percentage = 40.00 %

Amount of discount = $ 2178.00 and

Total amount = 3267.00

Calculate more (y/n): y

Enter the number of packages purchased: 105

Discount percentage = 50.00 %

Amount of discount = $ 5197.50 and

Total amount = 5197.50

Calculate more (y/n):

SCREENSHOT OF THE OUTPUT IN CODE::BLOCK

"C:\TURBOC3\Turbo C++\discount.exe" Х Enter the number of packages purchased: abc Invalid input. Quantity must be a whole number greater than a Process returned o (exe) Press any key to continue. execution time : 10.899 s

"C:\TURBOC3\Turbo C++\discount.exe" х Enter the number of packages purchased: 5 Discount percentage = 0.00 % Amount of discount = $ 0.00 and Total amount = 495.00 Calculate more (y/n): y Enter the number of packages purchased: 19 Discount percentage = 0.00 % Amount of discount = $ 0.00 and Total amount = 1881.00 Calculate more (y/n): y = Enter the number of packages purchased: 55 Discount percentage 40.00 % Amount of discount $ 2178.00 and Total amount = 3267.00 Calculate more (y/n): y = Enter the number of packages purchased: 105 Discount percentage 50.00 % Amount of discount = $ 5197.50 and Total amount = 5197.50 Calculate more (y/n):