Question

In Matlab. Use loops.

2. Create an algorithm to allow the user to enter a list of courses they have taken along with the grades received and the credit hours for each course, and then calculate the user's GPA. The program should first ask the user to type either Yes or No in response to the question, "Do you want to enter a grade?" If the answer is Yes, the user should be asked to enter the name of the course (text), the grade in the course (A, B, C, D, or F), and the number of credit hours for the course (a positive integer). If the user enters an invalid grade or an invalid number for the credit hours, he or she should be warned and asked to try again a maximum of th an appropriate error message should be generated and the program terminated. If they successfully enter the information for a course, the course name, the letter grade, and the credit hours should be displayed in a single row on the screen in an appropriate format, and then they should be asked again if they wish to enter a grade, and the entire process repeats if they answer Yes. If they answer No, the GPA should be calculated and displayed in an appropriate format, and then the program terminated unless no grades were entered (they typed No the first time) in which case an appropriate message should be generated and the program terminated. ree times, after which

Answer 1

Please find the required MATLAB code below along with necessary details in comments:

clear all
clc

% prompt user to enter the choice
prompt= '\nDo you wish to enter grade (Yes/No):';
decision=input(prompt,'s');

decision=lower(decision); % convert the response to lower case
count=0; % no. of subject whose info has been sucessfully eneterd

while strcmp(decision,'yes'); % if the choice to enter is yes
trail=1; % attempt one to enter the data
flag=0; % indicate the sucessfull attempt to enter info. flag=0 indicate data has not been entered
while flag~=1 && (trail==1 || trail==2 || trail==3)
flag=0;
% eneter the subject info
subject=input('\nEnter the name of subject:','s');
grade=input('\nEnter the grade (A-F):','s');
grade=upper(grade); % convert th grade to upper case
  
% if grade eneterd is not correct, issue a warning and repeat the process
if isempty(grade) || (~strcmp(grade,'A')&& ~strcmp(grade,'B')&& ~strcmp(grade,'C')&& ~strcmp(grade,'D') && ~strcmp(grade,'E')&& ~strcmp(grade,'F'))
warning('\nNot a valid grade. Please try again!');
trail=trail+1;
flag=0;
continue;
else
flag=1; % turn flag to 1 to indicate sucess status
end
  
% enter credit hour infomation
credit_hours=input('\nEnter the number of Credit hours:');
if isempty(credit_hours) || credit_hours<0
warning('\nCredit hours can not be negative. Please try again!');
flag=0;
trail=trail+1;
continue;
else
flag=1;
end
  
end
  
% check if information has been sucessfully enterd or not
if flag==0
fprintf('\nInvalid information. Terminating...');
break;
else % display the collected information
count=count+1;
fprintf('\nCourse \t Grade \t Credits\n');
fprintf('%s \t %s \t %3.2f',subject,grade,credit_hours);
Final_subject{count,1}=subject;
Final_grade(count,1)=grade;
Final_credit(count,1)=credit_hours;
end
  
decision=input(prompt,'s'); % ask user if he/she want to enter more data
decision=lower(decision);
  
end

% if user has stopped enetering new data
if ~strcmp(decision,'yes') && count~=0
% display the collected data
fprintf('\n The data entered is as follows:\n');
fprintf('\nCourse \t Grade \t Credits\n');
  
for k=1:size(Final_grade,1)
fprintf('\n%s \t %s \t %3.2f',Final_subject{k,1},Final_grade(k,1),Final_credit(k,1));
% find corresponding grade point for each grade
if strcmp(Final_grade(k,1),'A')
grade_point(k,1)=10;
elseif strcmp(Final_grade(k,1),'B')
grade_point(k,1)=9;
elseif strcmp(Final_grade(k,1),'C')
grade_point(k,1)=8;
elseif strcmp(Final_grade(k,1),'D')
grade_point(k,1)=7;
elseif strcmp(Final_grade(k,1),'E')
grade_point(k,1)=6;
else
grade_point(k,1)=10;
end
end
  
fprintf('\n GPA: %3.2f',mean(grade_point)); % report grade point average
  
end

------------------------ SCREENSHOT OF CODE

main script.m+ 1clear all 2-clc 5- 6- prompt user to enter the choice prompt- '\nDo you wish to enter grade decision-input (prompt,' ') ; (Yes/No) :'; 8- deci,ion-lower (decision) ; count-0 % convert the re ธpon e to lower ca5e % no. of ubject who e info has been ucessfully ene tera 10 11- 曰while strcmp〔dec1310n,' yea'); trail-1: tlag o if the choice to enter is yes attempt one to enter the data 13- % indicate the sucessfull attempt to enter info. flag=0 indicate data ha3 not been entered flag#0; 16 ene ter the subject info subject-input ('nEnter the name of subject:",'s grade-input (' \nEnter the grade (A-F): ' , ' s' ) ; grade-upper (grade) 19- 20 21 22- 23 24 25 26 % convert th grade to upper case if grade eneterd is not correct, 155ue a if isempty (grade) ii (-strcmp (grade ,'A')&& warning and repeat the process -strcmp (grade, 'B'}&& -strcmp (grade, 'C')&& -strcmp (grade,' D') && -str㎝p (grade, 'E')66 -strcmp (grade,' F')) warning(nNot a valid grade. Please try again! ' trail-trail 1 flag0 continue else 28- tlag-l % turn flag to 1 to indicate suce gtatuB 29 end

31 32 8 enter credit hour infomation credit hours-input ('AnEnter the number of Credit hours:'): if isempty (credit_hours) II credit houra<o 34 35 36- 37 38- 39 40- 41 42- 43 warning ('nCredit hours can not be negative. Please try again! flag 0 trail-trail 1: continue: flag-1: end end 8 check if information has been sucessfully enterd or not if flag0 45- 46- 47 - 48- 49- 50- fprintf ( ' \nInvalid information. Terminating.. break ); else d13play the collected information count-count+1 fprintfnCourse t Grade t Creditsln) fprintf ( ' %s \t %s \t %3 . 21' , subject, grade, credithours) ; Final subject (count, 1) aubject: Final qrade (count, 1)-qrade: Finalcredit (count,i)-credit_houra: - 52 53 54- 55- 56 57- 58- 59 60- end decision=input (prompt,'' ); decision-lower (deciaion) ask user if he/she want to enter more data end

61 62 63- 64 65- 66 - 67 68- 69 70 If user has stopped enetering new data if ~stremp (decision,' yes') “count 。 % display the collected data fprintf ('\n The data entered ¡ธ follow: \n"); fprintf nCourse t Grade \t Creditsin' for k-i:size (Final_grade, 1) tprint f ('\n \t 해 \t %3.2f', Final-subject { k, 1), Final-grade (k, 1), Final, credit (k, 1)); find corresponding grade point for each grade 72 73 74 75- 76 - i stremp (Einal_grade (k,),) elseif str㎝p (Finalgrade (k, 1), 'B') elseif stromp (inal_grade (k, 1), "C') elseif stremp (Final grade (k, 1),'D) elseif strcmp (Final_grade (k, 1),'E grade. .point (k, 1)=10; grade. Point Ik, 1)-9: grade point (k,1)8: grade. Point (k, 1)-7: grade. point (k, 1)6: grade, point (k,1)-10: - 78 79 80 else 82 83 84- 85 86- 87 end end fprintf('\n GPA : 3.2f' , mean (grade point)); % report grade point average - end 89 90

----------------------------------- SAMPLE OUTPUT

TEST CASE 1:

Command Window Do you wish to enter grade:yes Enter the name of subject Economics Enter the grade:A Enter the number of Credit hours:8 Course Grade Credits Economics Do you wish to enter grade: yes A 8.00 Enter the name of subject:Computers Enter the grade :B Enter the number of Credit hours:6 Course Grade Credits Computers Do you wish to enter grade:no B 6.00 The data entered is a3 follows: Course Grade Credits fx Economics A 8.00

Computers B 6.00 GPA: 9.50>>

TEST CASE 2:

Command Window Do you wish to enter grade: Yes Enter the name of subject:maths Enter the grade:g Warning: InNot a valid grade. Please try again! > In main script (line 20) Enter the name of subject maths Enter the grade:C Enter the number of Credit hours 10 Course Grade Credits maths C 10.00 Do you wish to enter grade yes Enter the name of subject:science Enter the grade: a Enter the number of Credit hours: 8 Course Grade Credits science Do you wish to enter grade: yes A 8.00

Enter the name of subject:english Enter the grade:a Enter the number of Credit hours:-4 Warning: InCredit hours can not be negative. Please try again! > In main script line 29) Enter the name of subject:english Enter the grade:a Enter the number of Credit hours:4 Course Grade Credits english Do you wish to enter grade no A 4.00 The data entered is a3 follows: Course Grade Credits с 10.00 maths science english GPA: 9.33>> A 8.00 A 4.00