Hi DM. How does a %s be used as a number and at the same time it's also a
word?

$ The Millionaire $

..."Will we ever fear the ecstasy of free thought?" - Thinkman...

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:30 pm

Hi DM. How does a %s be used as a number and at the same time it's also a word?

A string of characters can contain decimal digits (i.e. '0'-'9'). Or it might consist of only decimal digits, but still be a string.

digital man

Synchronet "Real Fact" #17:
"Vertrauen" (ver-trow-en) translates to "trust" in German, and was a band name. Norco, CA WX: 66.6øF, 53.0% humidity, 7 mph E wind, 0.00 inches rain/24hrs

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:30 pm

A string of characters can contain decimal digits (i.e. '0'-'9'). Or it might consist of only decimal digits, but still be a string.

digital man

Synchronet "Real Fact" #17:
"Vertrauen" (ver-trow-en) translates to "trust" in German, and was a band name. Norco, CA WX: 66.6øF, 53.0% humidity, 7 mph E wind, 0.00 inches rain/24hrs

But how does the text.dat know which %s it's using on the lines?

$ The Millionaire $

..."Will we ever fear the ecstasy of free thought?" - Thinkman...

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:38 pm

Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:30 pm

A string of characters can contain decimal digits (i.e. '0'-'9'). Or it might consist of only decimal digits, but still be a string.

But how does the text.dat know which %s it's using on the lines?

The order and type of the %-specifiers is significant. You can't re-arrange them. If you have a text.dat string with "%d %s", you can't change that to "%s %d" or the BBS will crash (for example).

digital man

This Is Spinal Tap quote #6:
David St. Hubbins: He was the patron saint of quality footwear.
Norco, CA WX: 66.6øF, 54.0% humidity, 10 mph NE wind, 0.00 inches rain/24hrs

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:38 pm

The order and type of the %-specifiers is significant. You can't re-arrange them. If you have a text.dat string with "%d %s", you can't change that to "%s %d" or the BBS will crash (for example).

digital man

This Is Spinal Tap quote #6:
David St. Hubbins: He was the patron saint of quality footwear.
Norco, CA WX: 66.6øF, 54.0% humidity, 10 mph NE wind, 0.00 inches rain/24hrs

For example (not real examples):

"You have no %s." 001 NoMail
"There are %s messages on the system." 002 NumberOfSystemMsgs

$ The Millionaire $

..."Will we ever fear the ecstasy of free thought?" - Thinkman...

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:49 pm

Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 03:38 pm

The order and type of the %-specifiers is significant. You can't re-arrange them. If you have a text.dat string with "%d %s", you can't change that to "%s %d" or the BBS will crash (for example).

For example (not real examples):

"You have no %s." 001 NoMail
"There are %s messages on the system." 002 NumberOfSystemMsgs

In both of those examples, those would be strings of character (text).

digital man

This Is Spinal Tap quote #12:
Nigel Tufnel: Well, I don't know - wh-wh-... what're the hours?
Norco, CA WX: 66.3øF, 55.0% humidity, 9 mph E wind, 0.00 inches rain/24hrs

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Re: % specifiers
By: The Millionaire to Digital Man on Fri Apr 03 2020 15:30:29

Hi DM. How does a %s be used as a number and at the same time it's also a word?

%s is a string... you really should check out the C printf formatting page(s) you've been pointed to in the past ;)


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