％i或％d使用printf（）在c中打印整数？ [英] %i or %d to print integer in c using printf()?

问题描述

我只是在学习C而且由于涉及到iOS开发，我对Objective-C有一点了解，但是，在Objective-C中我使用的是 NSLog（@％i，x） ; 将变量 x 打印到控制台但是我一直在阅读一些C教程，他们说要使用％d 而不是％i 。

I am just learning C and I have a little knowledge of Objective-C due to dabbling in iOS development, however, in Objective-C I was using NSLog(@"%i", x); to print the variable x to the console however I have been reading a few C tutorials and they are saying to use %d instead of %i.

printf（％d，x ）;
和 printf（％i，x）; 都将 x 打印到控制台正确。

printf("%d", x); and printf("%i", x); both print x to the console correctly.

这些似乎都让我到了同一个地方，所以我问经验丰富的开发人员哪个更受欢迎？还有一个语义正确或正确吗？

These both seem to get me to the same place so I am asking the experienced developers which is preferred? Is one more semantically correct or is right?

推荐答案

与 printf（）一起使用时，它们完全等效。就个人而言，我更喜欢％d ，它更经常使用（我应该说它是 int 的惯用转换说明符 ？）。

They are completely equivalent when used with printf(). Personally, I prefer %d, it's used more often (should I say "it's the idiomatic conversion specifier for int"?).

（％i 和％d 是与 scanf（）一起使用时，那么％d 总是需要十进制整数，而％i 将 0 和 0x 前缀识别为八进制和十六进制，但是没有理智的程序员使用 scanf（），所以这不应该是一个问题。）

(One difference between %i and %d is that when used with scanf(), then %d always expects a decimal integer, whereas %i recognizes the 0 and 0x prefixes as octal and hexadecimal, but no sane programmer uses scanf() anyway so this should not be a concern.)

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