Trying to create a GPA calculator?

I want to create a Cumulative GPA calculator using two scripts. The first script will ask for Class Name, Number, Credits, and Grade.

%Problem Statement: Gather information of a certain class
Transcript.CourseName = input('What is the Course Name?', 's' );
Transcript.CourseNumber =input('What ss the Course Number?', 's');
Transcript.CouseCredits = input('What is the Course Credits?');
Transcript.CourseGrade = input('What is your grade in that class?');

The second script will gather those informations from all the classes the user is taking, and calculate the Cumulative GPA

 %Problem Statement: Calculate the cumilative GPA from the grade of the
%three courses.

 %Input: i-number of classes

 %Output:GPA- Culmilative GPA

 Ask = input('How many classes are you taking?')

 numClass = Ask

 for i =1:numClass

    TRANSCRIPT(i).CourseName = input('What is the Course Name?', 's' );

    TRANSCRIPT(i).CourseNumber =input('What ss the Course Number?', 's');

    TRANSCRIPT(i).CourseCredits = input('What is the Course Credits?');

    TRANSCRIPT(i).CourseGrade = input('What is your grade in that class?');

    function(GPA_Cumli) = 

 end

As you can see, I haven't written the function yet because I do not know how'll this look. I know I am supposed to add the CourseGrade from all my classes then divide them by i, but I am struggling with the addition part. Any help would be appreciated.

Answer 1

[Rahul Goel]

Hi Seong,

You can change your function to something like this:

function GPA = calculateGPA()
 %Output:GPA- Culmilative GPA
 Ask = input('How many classes are you taking?')
 numClass = Ask;
 totalEarned = 0;
 totalCredits = 0;
 for i =1:numClass
    TRANSCRIPT(i).CourseName = input('What is the Course Name?', 's' );
    TRANSCRIPT(i).CourseNumber =input('What ss the Course Number?', 's');
    TRANSCRIPT(i).CourseCredits = input('What is the Course Credits?');
    TRANSCRIPT(i).CourseGrade = input('What is your grade in that class?');

      totalEarned = totalEarned + (TRANSCRIPT(i).CourseCredits * TRANSCRIPT(i).CourseGrade);
      totalCredits = totalCredits + TRANSCRIPT(i).CourseCredits;

   end

   GPA = totalEarned/totalCredits;
  end

Hope this helps!

Answer 2

[TARIK YAMAN]

Hi, Seong. You can improve and use the script.

clc;
clear;
clear all;

fid = fopen('my_transcript.txt','wt');
a = input('enter the number of course : ');
k = 0;

for i = 1:a;
    k = k + 1;
    fprintf('\nfor %3d. course\n',k);
    b(k) = input('\nenter the credits of this course : ');
    c = input('\nenter the your grade : ','s');
   
    switch c 
        case 'AA'
            d(k) = 4;
        case 'BA' 
            d(k) = 3.5;
        case 'BB'
            d(k) = 3;
        case 'CB' 
            d(k) = 2.5;
        case 'CC' 
            d(k) = 2.0;
        case 'DC'
            d(k) = 1.5;
        case 'DD' 
            d(k) = 1.0;
        case 'FD'
            d(k) = 0.5;
        case 'FF'
            d(k) = 0;
        case 'FG' 
            d(k) = 0;
        otherwise disp('your input is invalid, so it must be like AA , BB , DD , FG , FF');
            fprintf('\nfor %3d. course\n',k);
            e = input('\nenter the your grade again : ','s');
        switch e     
        case 'AA' 
            d(k) = 4;
        case 'BA' 
            d(k) = 3.5;
        case 'BB'
            d(k) = 3;
        case 'CB' 
            d(k) = 2.5;
        case 'CC' 
            d(k) = 2.0;
        case 'DC'
            d(k) = 1.5;
        case 'DD' 
            d(k) = 1.0;
        case 'FD'
            d(k) = 0.5;
        case 'FF'
            d(k) = 0;
        case 'FG' 
            d(k) = 0;
    end
end
    p(k) = d(k)*b(k);
    gano0 = sum(p)/sum(b);
    percent0(k) = 100*(b(k));
end
percent = percent0/sum(b);
table = [1:a;b;d;percent];
fprintf(fid,'course number         credit       grade        margin of effect on general grade\n');
fprintf(fid,'       %3d   %10.1d           %3.1f                   %10.4f\n',table);
fprintf(fid,'\nsum of credits : %3d      general grade :         %10.3f',sum(b),gano0);
fclose(fid);
clc;
open('my_transcript.txt');

[Liam]

@TARIK YAMAN I tried ur code and it worked great. thanks a bunch.