什么是UL％和％鲁C画幅符之间的区别？ [英] What's the difference between %ul and %lu C format specifiers?

问题描述

在的C的Primer Plus为例，笔者使用了％UL 格式说明（在scanf函数和printf）对于无符号长。当我尝试概括的问题，似乎％UL 使得一些错误在我的电脑。但是，使用鲁％解决了问题。

In an example of "C Primer Plus", the author has used %ul format specifier (in both scanf and printf) for unsigned long. When I try to generalize the problem, it seems that the %ul makes something wrong in my computer. But using %lu solved the issue.

其实，而非着眼于问题的codeS行了，我想知道的％UL 和的区别鲁％。也许我可以找出什么是错的。

Actually, rather than focusing on the problem and the line of codes, I want to know about the difference between %ul and %lu. Maybe I could figure out what's wrong.

搜索不给我一些有用的东西（除了它们是不同的）。

Searching doesn't give me something useful (except that "they are different").

任何解释或链接/参考AP preciated。

Any explanation or link/reference is appreciated.

推荐答案

％禄是正确的，而％UL 是的不正确的

一个 的printf 格式说明如下形式％[国旗] [宽度] [precision] [长度]说明。

U 是说明的意思是无符号的十进制整数。

u is a specifier meaning "unsigned decimal integer".

→是长度的修改意为长。

的长度的修改应在转换前的说明的，这意味着％禄走的是正确的。

The length modifier should go before the conversion specifier, which means %lu is correct.

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