student grade

[student91]

prompts user for the grades of each of the students and saves them an int array called grades. Your program shall check that the grade is between 0 and 100. program should then check if the grade is equal to or greater than 50, where 50 is the pass rate.

A sample output :

Enter the number of students: 3

Enter the grade for student 1: 55

Enter the grade for student 2: 108

Invalid grade, try again...

Enter the grade for student 2: 56

Enter the grade for student 3: 57

The average is 56.0

The maximum is 57

The minimum grade is 55

The number of fails is 0

The number of passes is 3
..


im quiet stuck on this one. I be pleased if I can get as much help as I can or some examples shown to me ..

our lecturer hasn't thought us a lot about java coding and now all of us are lost this is on of our projects we have to do.

thanks

[Norm]

What have you tried?
Do you have any specific questions?

Be sure to wrap any posted code in code tags:

[code=java]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

[student91]

I haven't that much done im confused so I gave up on it. downloaded a book also started reading it.

im just behind othersa. due to family problems at home. ive no one else to help me from my class . I don't really talk to them
also ive concentrated more on other projects so I gave up un java . haven't slept properly in 2 months lucky to get 4 hours a day .

I don't expect anybody to do my project for me but id like to get tips and put me on the right track.
Thank you

I have this at the started and other few lines as im doing along it with my research for the code that may suit me but not much working out at the minute

String average = " The average is : ";
String max = "The maximum grade is :";
String minimum = "The minimum grade is : ";
String fails = "The number of fails : ";
String pass = "The number of passes";

Scanner input = new Scanner(System.in);

//allow user input;
System.out.println("enter the number of students");
int num = input.nextInt();

[Norm]

Start by defining a class with a main() method.
It looks like you have part of this done: Have the main() method ask the user for the 1st input and read that input from the user.
The code needs to be put in a class and in a method so that it will compile and execute.
When that part is working, move to getting more input from the user.

Be sure to wrap any posted code in code tags:

[code=java]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

[student91]

ok combining to what needs to be done to have the program done as it shown as example below


"A sample output :
Enter the number of students: 3
Enter the grade for student 1: 55
Enter the grade for student 2: 108
Invalid grade, try again...
Enter the grade for student 2: 56
Enter the grade for student 3: 57
The average is 56.0
The maximum is 57
The minimum grade is 55
The number of fails is 0
The number of passes is 3 "

what else would I need to have, for a good start

[Norm]

Start slowly. Do one thing at a time: code it, compile it, execute it and test it with different values. When the tests are OK, move to the next item in the list.

[student91]

have very little time. I found out yesterday that this has to be done by Friday . and I have web development project , networks project and another coding project done by Friday. my head is fried how much of stress i've gone trough since our tutor piled up all the projects. im only weak in java coding. its just making me sick ..


I do research than I do the code. than im gone back to where I started .

[Norm]

Ok. Are you having problems now? Post the code and explain what the problem is.

Be sure to wrap any posted code in code tags:

[code=java]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

[student91]

public static void main(String[] args) {
// TODO code application logic here


String average = " The average is : ";
String max = "The maximum grade is :";
String minimum = "The minimum grade is : ";
String fails = "The number of fails : ";
String pass = "The number of passes";


Scanner input = new Scanner(System.in);

//allow user input;
System.out.println("enter the number of students");
int numStudents = input.nextInt();

int array[] = new int[numStudents];

System.out.println("Student grade " + numStudents );

for (int i = 0 ; i < array.length; i++ ) {
System.out.println("Student "+numStudents[i];
}
array[i] = input.nextInt();


}


it sort of runs but I cant find to name " student 1 grade 87 "
student 2 grade 59


like the program should be able output all named and numbered arrays .

[Norm]

Be sure to wrap any posted code in code tags:

[code=java]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

[student91]

 
public static void main(String[] args) {
 // TODO code application logic here
 
 
 String average = " The average is : ";
 String max = "The maximum grade is :";
 String minimum = "The minimum grade is : ";
 String fails = "The number of fails : ";
 String pass = "The number of passes";
 
 
 Scanner input = new Scanner(System.in);
 
 //allow user input;
 System.out.println("enter the number of students");
 int numStudents = input.nextInt();
 
 int array[] = new int[numStudents];
 
 System.out.println("Student grade " + numStudents );
 
 for (int i = 0 ; i < array.length; i++ ) {
 System.out.println("Student "+numStudents[i];
 }
 array[i] = input.nextInt();
 
 
 }

[Norm]

What is the output for the program look like now? How does the output need to be changed?

Which steps have you done and what step needs to be done next?

[student91]

im at the very start still im going round in circles.

the program is student grade calculator.
program asks user how many students is he going to put in ,
6 for example;


than program asks the user to put in the grade which will be an array called student student 1
than student 2
until the all 6 arrays are filled

we also limit the array that it cant that the grades < = 100 so we don't pass the grade mark of 100

if this happens the program will say invalid grade and will ask the user to re-enter a new number for student 3 .



..

this is my 1st year in java . we only being thought from copy and paste and im confused.

last year I found c++ to be a lot easier but we had different teacher that thought us top write the code on paper from our heads . not to copy

[Norm]

Let me restate:
The program currently prompts for and reads the number of students.
The next step you are working on is to read the grades for that number of students and save the grades in an array.
Is that right?
Do that part now and worry about the refinements in the next step.

If you have coded in C++, does that mean you understand programming concepts like arrays and loops and assignment statements?

[student91]

last year we had brilliant teacher that thought us C++ i was able to write the code on piece of paper
this year we have a monkey.. she showed us to copy code
i have forgotten some C++

with this program im not able to write it out i don't know i seem to be fried head is not thinking anymore.

if i had it same that doesn't work i be able to fix it .

    public static void main(String[] args) {
        // TODO code application logic here
 
 
        String average = " The average is : ";
        String max = "The maximum grade is :";
        String minimum = "The minimum grade is : ";
        String fails = "The number of fails : ";
        String pass = "The number of passes";
        String Invalid = "Invalid Grade for students, Try again";
 
                int maximum = 0;
		int total = 0;
		int sum = 0;
		double avg =0 ;
		int counter =0;
 
		boolean repeat ;
 
 
        Scanner input = new Scanner(System.in);
 
        //allow user  input;
        System.out.println("enter the number of students");
        int numStudents = input.nextInt();
 
        int array[] = new int[numStudents];
 
        System.out.println("Student grade " + numStudents );
 
        for (int i = 0 ; i < array.length; i++ ) {
           array[i] = input.nextInt();
 
        }
 
    for (int i=0; i<=array.length; i++)  {
        {  
            total += array[i];  
        }         
        avg = (total / array.length);  
       System.out.print("the average is "+ avg);  
    }
}
}

[Norm]

I'm not sure if you have a problem now or what it is.

[student91]

the problem is I cant find the code I need to get my program working

[Norm]

I cant find the code

What about trying to write it yourself?

You don't learn much by copy and pasting code.

[student91]

could someone give me tips . what I actually need for my program.

to have a program that works same way as below

prompts user for the grades of each of the students and saves them an int array called grades. Your program shall check that the grade is between 0 and 100. program should then check if the grade is equal to or greater than 50, where 50 is the pass rate.

A sample output :
Enter the number of students: 3
Enter the grade for student 1: 55
Enter the grade for student 2: 108
Invalid grade, try again...
Enter the grade for student 2: 56
Enter the grade for student 3: 57
The average is 56.0
The maximum is 57
The minimum grade is 55
The number of fails is 0
The number of passes is 3

 public static void main(String[] args) {
        // TODO code application logic here
 
 
        String average = " The average is : ";
        String max = "The maximum grade is :";
        String minimum = "The minimum grade is : ";
        String fails = "The number of fails : ";
        String pass = "The number of passes";
        String Invalid = "Invalid Grade for students, Try again";
 
                int maximum = 0;
		int total = 0;
		int sum = 0;
		double avg =0 ;
		int counter =0;
 
		boolean repeat ;
 
 
        Scanner input = new Scanner(System.in);
 
        //allow user  input;
        System.out.println("enter the number of students");
        int numStudents = input.nextInt();
 
        int array[] = new int[numStudents];
 
        System.out.println("Student grade " + numStudents );
 
        for (int i = 0 ; i < array.length; i++ ) {
           array[i] = input.nextInt();
 
        }
 
    for (int i=0; i<=array.length; i++)  {
        {  
            total += array[i];  
        }         
        avg = (total / array.length);  
       System.out.print("the average is "+ avg);  
    }
}
}

am I on the right track doing this program ??

[Norm]

am I on the right track

What does the program's output look like? Post its output and add some comments saying what needs to be changed and/or added.

[student91]

this is output of the program



Enter the number of students: 3 " 3 is for user input"

Enter the grade for student 1: 55 "55 user input "

Enter the grade for student 2: 108 "108 user input"

Invalid grade, try again... "program output"

Enter the grade for student 2: 56 "56 user input"

Enter the grade for student 3: 57 "57 user input"

The average is 56.0 " program output"

The maximum is 57 "program output"

The minimum grade is 55 "program output"

The number of fails is 0 "program output "

The number of passes is 3 "Program output "

[Norm]

Ok, that looks like you are almost finished. What needs to be changed or added?

[student91]

well a code above is what I have at the minute. im going back and forwards

the examples of output I have shown is what has to look like when its done

[Norm]

What steps have you done so far?
What is the step that you are working on?

[student91]

never mind im leaving this program alone. my head is fried ive been on this pc trying to build that that program for 11 hours. I think its time for me to chill and do more research later.


thanks