January 2013
Intermediate to advanced
628 pages
20h 7m
Portuguese (Portugal, Brazil)
Content preview from USE A CABEÇA! C
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scanf() pode causar overflows
66
Capítulo 2
ALERTA DE SEGURANCA!
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ALERTA DE SEGURANÇA!
Tome cuidado com scanf()
Há um pequeno... problema com a função scanf().
Até agora, todo o código que você escreveu tem
cuidadosamente colocado um limite no número de
caracteres que scanf() vai ler em uma função:
scanf("%39s", name);
scanf("%2s", card_name);
Por que será? Afinal, scanf() usa o mesmo tipo de formato
de strings que printf(), mas quando imprimimos uma string
com printf(), apenas usamos o %s. Bem, se apenas usar um
%s em scanf(), pode haver um problema quando alguém ficar
muito empolgado, digitando:
char food[5];
printf("Enter favorite ...
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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.