compare numbers in a textfile

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June 15th, 2004, 06:03 AM

froova

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compare numbers in a textfile

I have at textfile called about.txt where every line har 3 fields, it is built like this : name:sequensnumber:weeknumber
with this information :

nils:345:12
donald:234:14
isac:256:49
nolan:345:10

I want to compare field number 2(sequensnumber) with eachother in this file and print the fields if there are two that are alike.

eks. nils:345:12 has the same number nolan:345:10
in this file there is colons ( : ) between every information.

please help me.

June 15th, 2004, 07:18 AM

DaWei_M

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I'd read each line, tokenize on the colon, store the tokens in an array of structs, sort on the second member, iterate through, and print duplicates.

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June 15th, 2004, 09:28 AM

s00rko

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it also work if you do scanf("%d:%d:%d", ...) - fscanf or sscanf, you choose. i don't know if this is "legal", but it works for me - i sscanf a date in format dd.mm.yyyy that way.

June 15th, 2004, 09:33 AM

DaWei_M

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I believe that would be classified as "reading the line and tokenizing on the colon."

June 15th, 2004, 09:45 AM

mitakeet

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June 15th, 2004, 01:31 PM