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could anyone hlep me with that? pls

hello everyone
I need to update data base in file

1-ID
2-Name
3-ID group
4-ID teacher
5-mark list

unique ID is (ID+ID group+ID teacher)
we can append 5 th columns (marks list)

main...

cat tmp | tr '\n' ' '

I have a problem with add files to array and with compare student ID

awk 'BEGIN {x=0}{z=0}{y=0}

{getline base[x++] < "base" }

{getline input[z++] < "input" }

END
{for (i in base)
...

I try put both files to array and after that compare by student ID+teacher ID+class ID. But I do not no its good idea. And I do not now how to print it proper.

hello everyone
I need to update data base in file

1-ID
2-Name
3-ID group
4-ID teacher
5-mark list

unique ID is (ID+ID group+ID teacher)
we can append 5 th columns (marks list)

main...

Hi Friends,
Can any one help me with count average of student marks in this file (i can not change structure of the input file):

input file:
1 - student ID
2 - student name
3 - group ID
4 -...

Could anyone help me with that 2 additional columns at AWK?

Yes , I try it.
But i do not understand what means %s?

What means? %s

What I should change if input file will look little bit different:
I add 2 columns, so marks are now at 5 th column

1:John Smith:1:2:2 3 4 5
2:Mark Anderson::2:3:3 2
3:Susan...

Hi Friends,
Can any one help me with count average of student marks in this file (i can not change structure of the input file):

input file:

1:John Smith:2 3 4 5
2:Mark Anderson:3 2
3:Susan...