Need pseudo code help

[xToFxREAPER]

Hey guys, so my little sister is starting a computer science class in school and needs help with an algorithm that they have asked her to create. she was away from school for the day of the assignment due to a dentists appointment so she wasnt there for the lesson and i myself have not played with pseudo code enough to know how to do whats being asked although i have a basic code created already.

 

The question is this, devise an algorithm to compute the average, the maximum, and the minimum of a list of numbers. construct a flow chart to describe your algorithm. your algorithm should accept the list of numbers as input and print the results in a user friendly way. do not make any assumptions about how many numbers the list contains.

 

The code i have written for personal uses perviously

Pseudo Code:

 

Write "please enter 5 numbers"

Read n1,n2,n3,n4,n5

 

Write "The average is"

Set avg to (n1+n2+n3+n4+n5)/5

Write avg

 

If(n1 < n2)

  Set max to n2

Else

  Set max to n1

If(n3 > max)

  Set max to n3

If(n4 > max)

  Set max to n4

If(n5 > max)

Set max to n5

Write "The max is"

Write max

 

If(n1 > n2)

  Set min to n2

Else

  Set min to n1

If(n3 < min)

  Set min to n3

If(n4 < min)

  Set min to n4

If(n5 < min)

Set min to n5

Write "The min is"

Write min

 

So this code is limited to 5 numbers which isnt really what she needs for school so if anyone could either alter it or at least help me out i would really appreciate it

[Liikeaturtle]

I would just have it so it asks for the amount of input n, then creates a for loop like this

for(i = 0; i < n; i++)    if(x > y)        min = y;

You can probably figure out the rest.

[xToFxREAPER]

I would just have it so it asks for the amount of input n, then creates a for loop like this

for(i = 0; i < n; i++)    if(x > y)        min = y;

You can probably figure out the rest.

not really haha im pretty bad with pseudo actually i wrote mine almost 4 years ago when i was still in school and havent used it since so i kinda forgot it all lol

[Flojer0]

For input that doesn't have the amount pre-determined you want a loop that doesn't need a pre-determined end. 'While' loops are conventionally used in such a way. Note here the use of a separate variable to count the number of items we have. Also note that I use array notation here since it is straightforward but depending on the target language you'll possibly need another way to store data. This loop also assumes only positive numbers.

int num [];int count = 0;while (num > 0){    num[count]  = input;    count = count + 1;}

Now that you have the inputs you can go through a for loop as Likeaturtle suggested for your min/max/average. A couple of loops would go a long way to controlling those runaway if statements.

[tom564]

not really haha im pretty bad with pseudo actually i wrote mine almost 4 years ago when i was still in school and havent used it since so i kinda forgot it all lol

Pseudo code can be written many ways, convert code statements to english statements. 

[xToFxREAPER]

For input that doesn't have the amount pre-determined you want a loop that doesn't need a pre-determined end. 'While' loops are conventionally used in such a way. Note here the use of a separate variable to count the number of items we have. Also note that I use array notation here since it is straightforward but depending on the target language you'll possibly need another way to store data. This loop also assumes only positive numbers.

int num [];int count = 0;while (num > 0){    num[count]  = input;    count = count + 1;}

Now that you have the inputs you can go through a for loop as Likeaturtle suggested for your min/max/average. A couple of loops would go a long way to controlling those runaway if statements.

Thank you much we are working it out from there and its going quite well guess i should brush up on pseudo before she comes asking me for help again

[Flojer0]

Thank you much

Your welcome.  

[laxer]

Pretty simple but, I don't know how complex your psuedo code needs to be.

 

write "Input 5 numbers"

read n1,n2,n3,n4,n5

avg = (n1+n2+n3+n4+n5)/5

min=n1

max=n1

if(min>n2) min=n2

if(max<n2) max=n2

if(min>n3) min=n3

if(max<n3) max=n3

if(min>n4) min=n4

if(max<n4) max=n4

if(min>n5) min=n5

if(max<n5) max=n5

write "The avg,min and max are: " avg "," min " and " max

 

It would be easier if we could index the numbers in some sort of a loop. (if they were an array or if we could tokenize the input, but that is out of your/her skillset so no need)

[MikeD]

Pseudo code can take a lot of different forms (syntax) from almost pure english to nearly compilable in some language.

 

Since the question says that your algorithm already receives the list of numbers and that you don't know how many there are I don't think you need to read the numbers from the user interface or name those numbers (n1, n2, etc.).

 

I would do something along the lines of:

procedure algo(numberList)  //here are declared/initialized any variables you may need  min := 0  foreach n in numberList    //code to check min, max, ...    if n < min      min := n  //calculate avg and print everything