什么是在C函数“睡眠”正确的#include? [英] What is the proper #include for the function 'sleep' in C?
问题描述
我现在用的大牧场书呆子书Objective-C编程,它通过让我们写C中的前几章开始了。在我的计划已经创造了我一个,我用的是睡眠功能。在这本书中它告诉我把的#include<文件stdlib.h>
在的#include< stdio.h中>
部分。这应该摆脱,上面写着功能休眠的隐式声明是无效C99的警告。但由于某些原因后,我把的#include<&stdlib.h中GT;
,警告将不会消失。这问题不从运行正常停止程序,但我只是好奇哪个的#include
我需要使用!
I am using the Big Nerd Ranch book Objective-C Programming, and it starts out by having us write in C in the first few chapters. In one of my programs it has me create, I use the sleep function. In the book it told me to put #include <stdlib.h>
under the #include <stdio.h>
part. This is supposed to get rid of the warning that says "Implicit declaration of function 'sleep' is invalid in C99". But for some reason after I put #include <stdlib.h>
, the warning does not go away.. This problem does not stop the program from running fine, but I was just curious on which #include
I needed to use!
推荐答案
睡眠手册页说,这是在&LT宣布; unistd.h中&GT;
。你有没有在你的程序包含在此?
The sleep man page says it is declared in <unistd.h>
. Have you included this in your program?
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