Question

USING MATLAB:

Many organizations sell candy for fundraisers. Often the items are purchased in bulk to cut cost and suppliers offer quantity discounts.

1-5 bars = $ 0.75 each

6-10 bars = cost of 5 bars + $0.50 each additional

11-15 bars = cost of 10 bars + $0.40 each additional

More than 15 bars = cost of 15 bars + $0.30 each additional

Starting with the function

n = input('How many candy bars would you like to buy? ')

Create a program to prompt the user to enter the number of candy bars he or she would like to buy

and calculate the cost.

• Using if/else statements, calculate the cost of the total order ($) and the unit cost ($/bar) for any

value of n.

• Use the disp(‘ ‘) function to output the cost of the total order ($) and the unit cost ($/bar) for

any value of n

• If negative numbers are entered an error message should be displayed

Hint: num2str() and str2num()

extra credit:

Add strings together ['statement A' 'statementB'] = 'statement AstatementB'

The supplier offers a discount of 10% to repeat customers who purchase more than 15 bars.

• Use an additional input statement to determine if someone is a repeat customer

•   Use & or |logical operators to modify your program calculate the cost of the total order ($) and the unit cost ($/bar) for any value of n and repeat customer status.

Answer 1

Here is the answer for your question in MATLAB Programming Language.

CODE :

%% Required variables i = 1; repeat = 0; choice = " "; %% Loop to repeat until user says No "N" while(choice != "N") disp("-------------------------------"); fprintf(" Customer No. %d\n",(i)); disp("-------------------------------\n"); %% Read number of candy bars from customer n = str2num(input('How many candy bars would you like to buy? ', 's')); %% Validates value n while(n<=0) disp("\nPlease enter value greater than 0 \n"); n = str2num(input('How many candy bars would you like to buy? ', 's')); end %% Calculates cost for 5, 10, 15 bars fivebars = 5*0.75; tenbars = fivebars + 5*0.50; fifteenbars = tenbars + 5*0.40; totalCost = 0; unitCost = 0; %% Keeps track of repeated customer's count if(n>15) repeat = repeat + 1; end %% Calculates total order cost based on n value if (n>=1 && n<=5) if(n==5) totalCost = fivebars; else totalCost = n*0.75; end elseif (n>=6 && n<=10) if(n == 10) totalCost = tenbars; else totalCost = fivebars + (n-5)*0.50; end elseif (n>=11 && n<=15) if(n == 15) totalCost = fifteenbars; else totalCost = tenbars + (n-10)*0.40; end elseif (n>15) totalCost = fifteenbars + (n-15)*0.30; if (repeat > 1) disp("\nRepeated Customer...Thank you :)\nWe Offer you discount of 10%\n\n"); totalCost = totalCost - (totalCost*0.1); end end %% Calculates unit cost unitCost = totalCost/n; %% Displays output fprintf("\nCost of total order : $ %.2f",totalCost); fprintf("\nUnit Cost of each bar : $ %.2f\n\n",unitCost); choice = input('Another customer [Y/N]? ','s'); while((strcmp(choice,"N")!=1) && (strcmp(choice,"n")!=1) && ((strcmp(choice,"Y")!=1) && (strcmp(choice,"y")!=1))) disp("\nPlease enter valid choice.."); choice = input('Another customer [Y/N]? ','s'); end %% Increment i value by 1 i = i+1; end

SCREENSHOTS :

Please see the screenshots of the code below for indentations of the code .

1 2 3 4 %% Required variables i = 1; repeat = 0; choice = ""; 6 %% Loop to repeat until user says No "N" 7 while(choice != "N") 8 9 disp --"); 10 fprintf(" Customer No. %d\n",(i)); 11 disp \n"); 12 13 %% Read number of candy bars from customer 14 n = str2num(input('How many candy bars would you like to buy?', 's')); 15 16 %% Validates value n 17 while(n<=0) 18 disp("\nPlease enter value greater than 0 \n"); 19 n = str2num( input('How many candy bars would you like to buy?', 's')); 20 end 21 22 %% Calculates cost for 5, 10, 15 bars 23 fivebars = 5*0.75; 24 tenbars = fivebars + 5*0.50; 25 fifteenbars - tenbars + 5*0.40; 26 totalCost = 0; 27 unitCost = 0; 28 29 %% Keeps track of repeated customer's count 30 if(n>15) 31 repeat = repeat + 1; 32 end 33 34 %% Calculates total order cost based on n value

35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 if (n>=1 && n<=5) if(n==5) totalCost = fivebars; else totalCost = n*0.75; end elseif (n>=6 && n<=10) if(n == 10) totalCost = tenbars; else totalCost = fivebars + (n-5)*0.50; end elseif (n>=11 && n<=15) if(n == 15) totalCost = fifteenbars; else totalCost = tenbars + (n-10)*0.40; end elseif (n>15) totalCost = fifteenbars + (n-15)*0.30; if (repeat > 1) disp("\nRepeated Customer... Thank you :) \nWe Offer you discount of 10%\n\n"); totalCost = totalCost - (totalCost*0.1); end end %% Calculates unit cost unitCost = totalCost/n; %% Displays output fprintf("\nCost of total order : $ %.2f", totalCost); fprintf("\nUnit Cost of each bar : $ %.2f\n\n",unitCost); choice = input('Another customer [Y/N]? ','S'); while((strcmp(choice, "N")!=1) && (strcmp(choice, "n")!=1) && ((strcmp(choice, "Y")!=1) && (strcmp(choice,"y")!=1)))

while((strcmp(choice, "N")!=1) && (strcmp(choice, "n")!=1) && ((strcmp(choice, "Y") !=1) && (strcmp(choice,"y") !=1))) disp("\nPlease enter valid choice.."); choice = input('Another customer [Y/N]? ','S'); end 68 69 70 71 72 73 74 75 % Increment i value by 1 i = i+1; end

OUTPUT :

Result executed in 21.469 sec(s) Customer No. 1 How many candy bars would you like to buy? 5 Cost of total order : $ 3.75 Unit Cost of each bar : $ 0.75 Another customer [y/N]? Y Customer No. 2 How many candy bars would you like to buy? 10 Cost of total order : $ 6.25 Unit Cost of each bar : $ 0.62 Another customer [Y/N]? N

Result executed in 14.938 sec(s) Customer No. 1 How many candy bars would you like to buy? 18 Cost of total order : $ 9.15 Unit Cost of each bar : $ 0.51 Another customer [Y/N]? Y Customer No. 2 How many candy bars would you like to buy? 20 Repeated Customer ...Thank you :) We Offer you discount of 10% Cost of total order : $ 8.78 Unit Cost of each bar : $ 0.44 Another customer [Y/N]? N

Result executed in 15.958 sec(s) Customer No. 1 How many candy bars would you like to buy? -10 Please enter value greater than How many candy bars would you like to buy? 10 Cost of total order : $ 6.25 Unit Cost of each bar : $ 0.62 Another customer [y/N]? 10 Please enter valid choice.. Another customer [Y/N]? N

Any doubts regarding this can be explained with pleasure :)