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php SAPI struct 代码

typedef struct _sapi_module_struct sapi_module_struct; struct _sapi_module_struct { char *name; char *pretty_name; int (*startup)(struct _sapi_module_struct *sapi_m...

2012/08/07 00:54
182
c内存对齐--影响php变量占用的内存

当在C中定义了一个结构类型时,它的大小是否等于各字段(field)大小之和?编译器将如何在内存中放置这些字段?ANSI C对结构体的内存布局有什么要求?而我们的程序又能否依赖这种布局?这些问题...

2012/08/05 13:09
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一本介绍C指针的书--字符串和字符串数组6.3

The following program illustrates this using integer arrays instead of character arrays. ------------------- program 6.1 ---------------------- /* Program 6.1 from PTRTUT10.HTM ...

2012/08/04 15:11
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一本介绍C指针的书--字符串和字符串数组6.2

As long as we are discussing the relationship/differences between pointers and arrays, let's move on to multi-dimensional arrays. Consider, for example the array: char multi[5][...

2012/08/04 15:10
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一本介绍C指针的书--字符串和字符串数组6.1

Well, let's go back to strings for a bit. In the following all assignments are to be understood as being global, i.e. made outside of any function, including main(). We pointed ...

2012/08/04 15:09
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一本介绍C指针的书--指针和结构体5.2

Okay, so we know that our pointer is going to point to a structure declared using struct tag. We declare such a pointer with the declaration: struct tag *st_ptr; and we point it...

2012/08/04 14:44
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一本介绍C指针的书--指针和结构体5.1

As you may know, we can declare the form of a block of data containing different data types by means of a structure declaration. For example, a personnel file might contain stru...

2012/08/04 14:43
17
一本介绍C指针的书--字符串4.1

Well, we have progressed quite a way in a short time! Let's back up a little and look at what was done in Chapter 3 on copying of strings but in a different light. Consider the ...

2012/08/04 14:42
15
一本介绍C指针的书--指针和字符串3.2

Of course, what the above program illustrates is a simple way of copying a string. After playing with the above until you have a good understanding of what is happening, we can ...

2012/08/04 14:40
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一本介绍C指针的书--指针和字符串3.1

The study of strings is useful to further tie in the relationship between pointers and arrays. It also makes it easy to illustrate how some of the standard C string functions ca...

2012/08/04 14:38
19
一本介绍C指针的书--指针的类型及数组2.2

Earlier when discussing the term "lvalue" I cited K&R-2 where it stated: "An object is a named region of storage; an lvalue is an expression referring to an object". This raises...

2012/08/04 14:33
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一本介绍C指针的书--指针的类型及数组2.1

Okay, let's move on. Let us consider why we need to identify the type of variable that a pointer points to, as in: int *ptr; One reason for doing this is so that later, once ptr...

2012/08/04 14:32
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一本介绍C指针的书--指针是什么1.3

To review: · A variable is declared by giving it a type and a name (e.g. int k;) · A pointer variable is declared by giving it a type and a name (e.g. int *ptr) where the aste...

2012/08/04 14:29
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一本介绍C指针的书--指针是什么1.2

However, at this point, the definition originally cited above is sufficient. As we become more familiar with pointers we will go into more detail on this. Okay, now consider: in...

2012/08/04 14:25
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一本介绍C指针的书--指针是什么1.1

One of those things beginners in C find difficult is the concept of pointers. The purpose of this tutorial is to provide an introduction to pointers and their use to these begin...

2012/08/04 14:13
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