用C ++读取文件（fseek（fi，0L，SEEK_SET）; [英] Read file in C++ (fseek(fi, 0L, SEEK_SET);

问题描述

我说一点英语，希望你理解。非常感谢！

我有问题



在我的文件中有代码......

fseek（fi，0L，SEEK_SET）;



我不知道什么是字符0L？我知道这个位置（0L）是一个数字，但是它有L。你可以向我解释一下吗？非常感谢。

I speak a little English and I hope you understand. Thank you very much!
I have a problem

In my file has code...
"fseek(fi, 0L, SEEK_SET);"

I don't known what is characters "0L"? As I know this position("0L") is a number, but this has "L". You can explain to me? Thank you very much.

推荐答案

谷歌是回答这类基本问题的最好方法。

如果你看看fseek，你会找到第二个参数offset是一个长整数。

www.cplusplus.com/reference/cstdio / fseek / [ ^ ]



0L是告诉编译器你不想要0 int而你想要0 long int的方法。



http://forums.codeguru.com/showthread .php？154957-What-do-0L-mean& p = 427386＃post427386 [ ^ ]

Google is the best way to answer this type of basic question.
If you look at fseek you will find the second parameter offset is a long integer.
www.cplusplus.com/reference/cstdio/fseek/[^]

0L is a way of telling the compiler that you don't want 0 int but you want 0 long int.

http://forums.codeguru.com/showthread.php?154957-What-does-0L-mean&p=427386#post427386[^]

我猜0L表示0号为Long typ e，因为该功能需要长数字



我记得以浮点表示0.0，我们也可以写0.0f



希望这对你有所帮助！



顺便问一下，你是越南语kimnguyentran ??

I guess 0L is to indicate the 0 number is in Long type, as the function requires long number at that point

I remember to indicate 0.0 in floating point, we can write 0.0f too

Hope this help you!

By the way, are you Vietnamese kimnguyentran??

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