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C#•2y ago

The king of kings

❔ Using methods in Grade Statistics project

Write a method PrintoutGrades that prints the grades. Write a method Statistics that will calculate the number of "A", "C" and "F" grades and the total number of grade points. When the Statistics method is called, the grade statistics must be printed.

55 Replies

Angius•2y ago

Sounds like a nice and simple exercise, good luck 👌

The king of kingsOP•2y ago

Hello there Well! For me, it's not that simple to implement it, therefore I need your knowledge to put it into code 😉

Angius•2y ago

What have you tried?

The king of kingsOP•2y ago

Let me show u what I have built so far

using System;
namespace GradeStatisticsApp
{
    public class Points_Grades
    {
        public static int Points { get; set; }
        public static char Grades { get; set; }
        public Points_Grades(int ponits, char grades)
        {
            Points = ponits;
            Grades = grades;
        }

        public static void CheckAlphabetical()
        {
           
        }

        public static void ReadScore()
        {
           

        }

        public static void ConvertPointsIntoGrades()
        {
            
        }
    }
}

using System;
namespace GradeStatisticsApp
{
    public class Points_Grades
    {
        public static int Points { get; set; }
        public static char Grades { get; set; }
        public Points_Grades(int ponits, char grades)
        {
            Points = ponits;
            Grades = grades;
        }

        public static void CheckAlphabetical()
        {
           
        }

        public static void ReadScore()
        {
           

        }

        public static void ConvertPointsIntoGrades()
        {
            
        }
    }
}

using System;
using System.Text.RegularExpressions;
namespace GradeStatisticsApp
{
    class Program
    {
        static void Main(string[] args)
        {
 string[] subject = { "Mathematic", "Swedish", "English", "History", "Physic" };
            int[] points = new int[5];
            char[] grade = new char[6];
Points_Grades.CheckAlphabetical();
            Console.Write("\nEnter the student name:\t");
            string userInput1 = Console.ReadLine();
            Console.WriteLine("");
            /*foreach (char name in userInput1)
            {
                Console.WriteLine();
            }
            Points_Grades.ReadScore();*/
            
            for (int i = 0; i < 5; i++)
            {
                Console.Write(subject[i]);
                
                Console.Write($"\nEnter the points: ");
                bool condition = int.TryParse(Console.ReadLine(), out int point);
                Console.Write("");
                if (condition == false)
                {
                    throw new Exception("Invalid user input");
                }
                if (point <= 100 && point >= 50)
                {
                    Console.Write(Convert.ToChar('A'));
                    var grade1 = Console.ReadLine();
                }
                if (point >= 0 && point < 50)
                { Console.Write(Convert.ToChar('F'));
                    var grad2 = Console.ReadLine();
                }
                else if (point > 100)
                {
                    throw new Exception("User input out of range");
                }
                Console.WriteLine("");
Console.Write(subject[0]);
Console.Write(subject[1]);
Console.Write(subject[2]);
Console.Write(subject[3]);
Console.Write(subject[4]);
            }
        }
    }
}

using System;
using System.Text.RegularExpressions;
namespace GradeStatisticsApp
{
    class Program
    {
        static void Main(string[] args)
        {
 string[] subject = { "Mathematic", "Swedish", "English", "History", "Physic" };
            int[] points = new int[5];
            char[] grade = new char[6];
Points_Grades.CheckAlphabetical();
            Console.Write("\nEnter the student name:\t");
            string userInput1 = Console.ReadLine();
            Console.WriteLine("");
            /*foreach (char name in userInput1)
            {
                Console.WriteLine();
            }
            Points_Grades.ReadScore();*/
            
            for (int i = 0; i < 5; i++)
            {
                Console.Write(subject[i]);
                
                Console.Write($"\nEnter the points: ");
                bool condition = int.TryParse(Console.ReadLine(), out int point);
                Console.Write("");
                if (condition == false)
                {
                    throw new Exception("Invalid user input");
                }
                if (point <= 100 && point >= 50)
                {
                    Console.Write(Convert.ToChar('A'));
                    var grade1 = Console.ReadLine();
                }
                if (point >= 0 && point < 50)
                { Console.Write(Convert.ToChar('F'));
                    var grad2 = Console.ReadLine();
                }
                else if (point > 100)
                {
                    throw new Exception("User input out of range");
                }
                Console.WriteLine("");
Console.Write(subject[0]);
Console.Write(subject[1]);
Console.Write(subject[2]);
Console.Write(subject[3]);
Console.Write(subject[4]);
            }
        }
    }
}

Angius•2y ago

Well, grades are stored in an array Seems like the Statistics method needs to count how many As are in there, how many Bs, and so on Usually, it's easiest to achieve with a dictionary Dictionary<char, int> for example

The king of kingsOP•2y ago

This one is more clear https://paste.mod.gg/ryrklgewvdtc/1

BlazeBin - ryrklgewvdtc

A tool for sharing your source code with the world!

Angius•2y ago

You can fill the dictionary, then loop over the array of grades, and increment the dictionary as needed

var dict = new Dictionary<char, int>(){
    ['A'] = 0,
    ['B'] = 0,
    // ...
};

foreach (var grade in grades)
{
    dict[grade] += 1;
}

var dict = new Dictionary<char, int>(){
    ['A'] = 0,
    ['B'] = 0,
    // ...
};

foreach (var grade in grades)
{
    dict[grade] += 1;
}

Something like this

The king of kingsOP•2y ago

Well! This is an assignment from my course obviously and they want me to use an array to build the project. This is the complete assignment requirements:

Write a method ReadPoints to read the student's grade points in the various subjects.
You should save the points in an array, vector or list.
When the method is called, the user must enter a number of grade points.
The grade points to be entered are controlled by the contents of the subject field.

Write a method that will convert the points into grades according to the scale A-F.
The grade A corresponds to 100 points.
The grade F corresponds to less than 50 points
You must store the grades in a field (array, vector or list).


Write a method printPrintGrades that prints the grades.
Write a method Statistics that will calculate the number of "A", "C" and "F" grades and the total number of grade points.
When the Statistics method is called, the grade statistics must be printed.
Write pseudocode for this method. Also draw flow charts.

You don't need to write pseudo code or draw flow diagrams for the entire program.
Compile and run the program.

Write a method ReadPoints to read the student's grade points in the various subjects.
You should save the points in an array, vector or list.
When the method is called, the user must enter a number of grade points.
The grade points to be entered are controlled by the contents of the subject field.

Write a method that will convert the points into grades according to the scale A-F.
The grade A corresponds to 100 points.
The grade F corresponds to less than 50 points
You must store the grades in a field (array, vector or list).


Write a method printPrintGrades that prints the grades.
Write a method Statistics that will calculate the number of "A", "C" and "F" grades and the total number of grade points.
When the Statistics method is called, the grade statistics must be printed.
Write pseudocode for this method. Also draw flow charts.

You don't need to write pseudo code or draw flow diagrams for the entire program.
Compile and run the program.

Angius•2y ago

I don't see any mention of dictionaries being disallowed Because, without a dictionary, you're looking at much more much worse code

The king of kingsOP•2y ago

Really! I agree with you. This project seems a bit hard to implement.

Angius•2y ago

var sums = new int[]{0, 0, 0, 0, 0, 0};

foreach (var grade in grades)
{
    switch (grade) {
        case 'A':
            sums[0] += 1;
            break;
        case 'B':
            sums[1] += 1;
            break;
        case 'C' //...
    }
}

var sums = new int[]{0, 0, 0, 0, 0, 0};

foreach (var grade in grades)
{
    switch (grade) {
        case 'A':
            sums[0] += 1;
            break;
        case 'B':
            sums[1] += 1;
            break;
        case 'C' //...
    }
}

The king of kingsOP•2y ago

Ok! So you recommend me to use dictionary.

Angius•2y ago

Or maybe you could get the index by using the fact, that chars are integers under the hood

var sums = new int[]{0, 0, 0, 0, 0, 0};
//                   A  B  C  D  E  F

foreach (var grade in grades)
{
    sums[grade - 'A'] += 1;
}

var sums = new int[]{0, 0, 0, 0, 0, 0};
//                   A  B  C  D  E  F

foreach (var grade in grades)
{
    sums[grade - 'A'] += 1;
}

A dictionary would be the most straightforward

The king of kingsOP•2y ago

Ok

Angius•2y ago

Should a dictionary be forbidden, the way with calculating index from char would be my choice

The king of kingsOP•2y ago

OK The problem is that this project seems more advanced to me and some of the concepts you're using looks a bit confusing to me.

Angius•2y ago

Which ones?

The king of kingsOP•2y ago

What is this code doing?

Angius•2y ago

A switch is a more concise way of writing a bunch of if/else statements

The king of kingsOP•2y ago

I haven't used even B grade in my project

Angius•2y ago

You could write it as

var sums = new int[]{0, 0, 0, 0, 0, 0};

foreach (var grade in grades)
{
    if (grade == 'A')
    {
        sums[0] += 1;
    }
    else if (grade == 'B')
    {
        sums[1] += 1;
    }
    else if (grade == 'C')
    {
        // ...
    }
}

var sums = new int[]{0, 0, 0, 0, 0, 0};

foreach (var grade in grades)
{
    if (grade == 'A')
    {
        sums[0] += 1;
    }
    else if (grade == 'B')
    {
        sums[1] += 1;
    }
    else if (grade == 'C')
    {
        // ...
    }
}

The king of kingsOP•2y ago

I know how the switch works, but why you're using it?

Angius•2y ago

To count how many of each grade there is..?

var sums = new int[]{0, 0, 0, 0, 0, 0};
//                   A  B  C  D  E  F

var sums = new int[]{0, 0, 0, 0, 0, 0};
//                   A  B  C  D  E  F

The king of kingsOP•2y ago

Ah! Ok! This one looks more clear. Ok

Angius•2y ago

The first number is the amount of A grades, the second is the amount of B grades, and so on

The king of kingsOP•2y ago

The thing that most confuses me in this assignment is the B grade. They have mentioned that 100 or less points are A and 50 or less is F so I wonder why u used B and etc..?

Angius•2y ago

That's usually how grades work So I made the assumption we're talking about normal, regular, American school grades Never heard of a system that would be only using A and F

Write a method that will convert the points into grades according to the scale A-F

From your assignment It is a scale from A to F A is 100 points, F is less than 50 points, the other grades are spread between those

The king of kingsOP•2y ago

You're right. But it feels like there are some mistakes in the assignment. Well! Actually, I'm chatting with you from Sweden, not from the USA.

Angius•2y ago

Still, you probably have a grade system that consists of more than just "perfect" and "failure"

The king of kingsOP•2y ago

I know you guys in America use this system when it comes to setting grades for the students in your schools and it should be the same here in Sweden. Ok! I get your point. But the question remains, why the hell they didn't specify limited points for the rest of the grades like B, C, D, and E 🤔 this is what confuses me the most 🤨 How the hell am I gonna do this if I don't know what those grades hold a number of points 🤷🏻‍♂️

Angius•2y ago

A - 100
B - 90
C - 80
D - 70
E - 60
F - 50

A - 100
B - 90
C - 80
D - 70
E - 60
F - 50

Distributes itself quite nicely

The king of kingsOP•2y ago

Ok! It makes sense, although you're talking about even numbers, according to my course teacher the points can be odd numbers too. For ex: he sent me a model that looks like this: The

task:
You need to enter points for 5 subjects and print the grade. For example:

Enter points for math? 80 p
Enter points for Swedish? 50 p
......
.....
Then you print out the grade
Subject Grade
Mathematics B
Swedish E

Oh! Sorry, I was wrong earlier, you're right. They want just like this form you mentioned. Sorry for taking too long with the project. Just wanna ask you about the methods that are mentioned in the assignment. Do they mean void methods or different types of methods?

The king of kingsOP•2y ago

I'm terrible at void methods, although I have watched many tutorials, but still bad at using them 🤷🏻‍♂️

The king of kingsOP•2y ago

As u c see I created a method called Convert bla bla but didn't need to use it when I did the converting in Program.cs

Angius•2y ago

Going by the paragraphs... 1st method doesn't mention anything either way 2nd method definitely has to be non-static and probably void 3rd method definitely void 4ths method void as well

The king of kingsOP•2y ago

Ok! Well! The first one is already done. The second one needs some updating by adding these grades B, C, D, E, and F.

The king of kingsOP•2y ago

I got two errors while adding your last code

Angius•2y ago

Pretty self-explanatory Some variable named grade already exists Use a different name

The king of kingsOP•2y ago

Ok! I changed it to grade1 instead, how about the second error! It's giving me a various solution Well! The second error is gone now too after changing it grade. The program doesn't output any result after adding your code.

Angius•2y ago

Well, do you tell it to output anything?

The king of kingsOP•2y ago

Yes Look

The king of kingsOP•2y ago

Angius•2y ago

What is grade?

The king of kingsOP•2y ago

You can see it inside of foreach

Angius•2y ago

No, I can't

Angius•2y ago

I see it being used

Angius•2y ago

I don't see it being declared I don't see what values it has

The king of kingsOP•2y ago

Ok Well! In the beginning, it was grades and I changed it to grade because of the error. May I call you to please if you're available?

Angius•2y ago

Not available, I'm afraid

The king of kingsOP•2y ago

Ok! It's alright. I don't really understand the code that you provided me I don't know the purpose of this code

Angius•2y ago

Assuming your array of grades is something like [A, B, A, A, F, C, D, A, D, F], the purpose of this code is to count the occurence of each grade

The king of kingsOP•2y ago

Ok! So you're talking about the third paragraph in the assignment?

Angius•2y ago

I believe so..?

The king of kingsOP•2y ago

Ok! I see. So how do I do that?

Write a method printPrintGrades that prints the grades.
Write a method Statistics that will calculate the number of "A", "C" and "F" grades and the total number of grade points.
When the Statistics method is called, the grade statistics must be printed.

I think the first method is complete, right? Because the project is currently printing out the grades.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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