August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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2.8. Przekazanie danych wyjściowych i komunikatów o błędach do różnych plików
Problem
Wiemy, że program wygeneruje listing wynikowy. Nie chcemy jednak, żeby występowały w nim komunikaty o błędach. Chcemy zapisać komunikaty o błędach, ale oddzielenie ich od danych użytkowych jest dość trudne.
Rozwiązanie
Należy skierować dane i komunikaty o błędach do różnych plików.
$ mójprogram 1>dane.txt 2>błędy.txtInny, częściej stosowany sposób polega na wykorzystaniu składni:
$ mójprogram >dane.txt 2>błędy.txtAnaliza
Zastosowanie przedstawionych instrukcji spowoduje utworzenie przez powłokę dwóch różnych plików. Pierwszy (dane.txt) będzie przechowywał ewentualne dane wyjściowe z programu mójprogram. Natomiast w pliku błędy.txt zostaną umieszczone komunikaty o błędach. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.