格式说明符％i和％d在printf的区别 [英] Difference between format specifiers %i and %d in printf

问题描述

什么是％d个和％I 的格式说明在使用时的printf ？

What is the difference between %d and %i when used as format specifiers in printf?

推荐答案

它们是相同用于输出时，例如与的printf 。

They are the same when used for output, e.g. with printf.

然而，这些输入说明例如使用时是不同的与 scanf函数，其中％d个扫描一个整数作为符号十进制数，但％I 默认为小数，但也允许十六进制（如$ p $由 0X pceded）和八进制如果$ p $由 pceded 0 。

However, these are different when used as input specifier e.g. with scanf, where %d scans an integer as a signed decimal number, but %i defaults to decimal but also allows hexadecimal (if preceded by 0x) and octal if preceded by 0.

所以 033 将27 ％I ，但33 ％d个。

So 033 would be 27 with %i but 33 with %d.

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