Question

The following section of pseudocode inputs a number, n, multiplies together
1 x 2 x 3 x………. x n , calculates input number /sum and outputs result of the calculation.
Locate the 3 errors and suggest a corrected piece of code.
1 input n
2 for mult = 1 to n
3 sum =0
4 sum = sum * mult
5 result = n / sum
6 next
7 print result

Answer 1

@Christos

Answer 2

@Cal.lavender u get it ???

Answer 3

I don't actually understand what the question is asking...

Answer 4

are we dividing n! by sum, or n by sum?

Answer 5

its \[input number \div Sum\]

Answer 6

@hari5719 I don't have the slightest idea about computer sciences, sorry

Answer 7

oh its ok

Answer 8

I still don't understand what's going on. you want
\[\frac{\sum_{i=1}^{n}i}{n!}\]

Answer 9

is that correct?

Answer 10

ya i guess whats the sigma signify

Answer 11

you want, for n=5,
(1*2*3*4*5)/(1+2+3+4+5)?

Answer 12

yea thats right

Answer 13

1 input n
2 for mult = 1 to n
3 sum =0
4 sum = sum * mult
5 result = n / sum
6 next
7 print result
Try running this code in your head for n=3... what happens? just go through the first 5 steps

Answer 14

sum is suppose to be 1

Answer 15

it might be easier for you to actually implement this code in say, python

Answer 16

idk python so much i know vb ,html , learnin java

Answer 17

well what are the errors in the code @inkyvoyd

Answer 18

go here
http://pythonfiddle.com/
copy and paste this code which I have translated to python


n=5
for mult in range(1,n):
sum = 0
sum = sum * mult
result = n / sum
print(result)

click run
what happens?

Answer 19

it says this i have no clue ..@inkyvoyd

Answer 20

ok why are we getting an error? what kind of error is it? what happened?

Answer 21

division by zero error its because sum = 0 right ??

Answer 22

yes.

Answer 23

so what might we initialize sum to?

Answer 24

is it one ???

Answer 25

well, change it to 1 and then run the code... if for 1 to 5, what answer do we expect?

Answer 26

it says 1 ?

Answer 27

yes, and what should we expect for n=5?

Answer 28

says 1 check it

Answer 29

@paki @ParthKohli @pooja195

Answer 30

It looks like they are taking the average. Well right off the back I cN tell 3 is wrong. Let me explain why. If we state sum is = 0 and then in step 4 you multiply sum by n no matter what the number is sum will always equal zero.

Answer 31

And I feel like number 5 should be inversed meaning it should be sum divided by n

Answer 32

oh thx u get any more

Answer 33

@christos can u find the third error

Answer 34

what is your ans?

Answer 35

i got one as sum=0 , 5/sum , and i dont know the other @rvc

Answer 36

input no n
then m<-n!

Answer 37

okay i get the same errors as u got

Answer 38

yeah so whaats the last one ?? @rvc

Answer 39

6 next is for what?

Answer 40

i think to go to the next number @rvc

Answer 41

@hari5719 that is correct

Answer 42

oh ok @kva1992 then what is the other error

Answer 43

not sure i finally got a computer so let me take a look at the problem properly.

Answer 44

oh thx

Answer 45

this is more of a question than an answer but wouldnt 1 be incorrect? Read what it says carefully.

Answer 46

"inputs a number, n," never in there does it state that n is the inputed number

Answer 47

i may be over analyzing but that's what i can see tbh

Answer 48

If i had to guess from the knowledge i have i would say its 1 3 and 5 but dont quote me i could be wrong

Answer 49

how is it 1 ??? i know 3 and 5 are right but how 1?? @kva1992

Answer 50

Because no where in the problem does it state input is n it says you have an input, n that doesn't mean input equals n does that make sense? I could say n is 20 and input is what the user typed in other words I would comprehend it as n and input are two different variables