Student mark's program - need help

worschtl · **Posted:** Thu Mar 22, 2007 1:16 pm

Hello!

For Grade 11 Computerengineering I have to complete the attached assignment. I' ve been desperately trying to do so, but still couldn't figure it out myself. The reason why is probably that I didn't take Grade 10. Still, my teacher is not willing to help me Crying or Very sad

... hopefully you guys will, that would just be awsome!

This is what I' ve got so far:

code:

procedure clearScreen
var ch : string (1)
put "Press ENTER to clear the screen and continue."
getch (ch)
cls
end clearScreen

var marks : array 1 .. 6, 1 .. 50 of int %stores the student's marks
var studentnumber : string %The studentnumber
var mark : string %
var nomark : string
var Test : boolean
var flag : string
var test : string
var num : int
var num1 : int
var num2 : int
var upper_bounds : string

flag := "continue"

loop
put "Please enter a seven digit student number. Type in 9999999 to quit."
get studentnumber %gets the studentnumber
if studentnumber = "9999999" then %leaves the loop when the studennumber is 9999999
flag := "Exit"
if flag = "Exit"
then
exit
end if
end if

Test := strintok (studentnumber) %checks the input
if Test then
num := strint (studentnumber)
else
put studentnumber, " is not a valid student number."
end if
if Test then
if length (studentnumber) < 7 then
put "The student number must be 7 digits long. Type 0's in the beginning if necessary"
elsif length (studentnumber) > 7 then
put "The student number must be 7 digits long. Type 0's in the beginning if necessary"
elsif length (studentnumber) = 7 then
exit when num > 0
if num <= 0 then
put studentnumber, " is not a valid student number."
end if
end if
end if
end loop
loop
if studentnumber = "9999999" then %leaves the loop when the studennumber is 9999999
flag := "Exit"
flag := "Exit"
if flag = "Exit"
then
exit
end if
end if
put "Please enter the number of marks for student: ", studentnumber
put "You cannot enter more than six test marks. "
get upper_bounds %gets the number of marks
if strintok (upper_bounds) = true then %checks the input
num1 := strint (upper_bounds)
if num1 >= 1 and num1 <= 6 then
flag := "Exit"
if flag = "Exit"
then
exit
end if
end if
if num1 < 1 or num1 > 6 then
put "You must enter a number between 1 to 6."
end if
else
put upper_bounds, " is not a valid integer."
end if
end loop
loop
for i: 1..num1
if studentnumber = "9999999" then %leaves the loop when the studennumber is 9999999
flag := "Exit"
if flag = "Exit"
then
exit
end if
end if
put "Please enter the test ", i ," mark for student ", studentnumber, " as a number between 1 to 100."
get mark %gets the student's mark
if strintok (mark) = true then %checks the input
num2 := strint (mark)
if num2 < 0 or num2 > 100 then
put "Your value of ", mark, " was not between 0 to 100."
end if
if num2 >= 0 or num2 <= 100 then
flag := "Exit"
if flag = "Exit"
then
exit
end if
else
put "Your value of ", mark, " was not between 0 to 100."
end if
end if
end for
end loop

Now I don't know how to move on to the next mark in the 3rd loop, when a valid mark was entered. In addition, I think I'm missing arrays and i dont really know how to use them, even though having worked through the tutorial on this site. Sad

Hope you guys can help me, the assignment is already overdue...
Thank you very much in advance, regards

worschtl Wink

Tony · **Posted:** Thu Mar 22, 2007 2:31 pm

The forum policy is to not directly answer homework questions, though we will help you learn concepts and ideas needed to solve your assignments.

Uploading your entire assignment is a bad idea, your best bet is to ask specific questions, such as about troubles you're having with arrays. (Best to specify what, otherwise you'll just get directed to the tutorials again)

worschtl · **Posted:** Thu Mar 22, 2007 3:51 pm

Alright, so how would I use an array in the program above, to save the student numbers 1-50 and the marks 1-6t for each of them in an array?

Thanks, worschtl Wink

Clayton · **Posted:** Thu Mar 22, 2007 3:57 pm

The easiest way would be to use a custom type. Check out the records and types tutorial in the Turing Walkthrough for more info, but some sample code:

Turing:

var students : array 1 .. 50 of
record
marks : array 1 .. 6 of int
name : string
end record

put "Enter student 1's first mark"
get students (1).marks (1)

worschtl · **Posted:** Thu Mar 22, 2007 4:09 pm

Thanks for your answer,

I'll try to apply that to my program now. But I've got another problem: How can I get the 3rd loop to run just as many times as the user entered that there are marks to be entered?

Tony · **Posted:** Thu Mar 22, 2007 6:58 pm

You would want to have a for loop that would run up to its limit, and then stop.

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