blocks|key|432676|text|结构本身没有数据。您需要创建struct类型的对象并设置对象...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|432677|struct+potNumber+{
++++int+array[20];
++++char+*theName[42];
};

/*+I+like+to+separate+the+type+definition+from+the+object+creation+*/
struct+potNumber+aPot[3];
/*+with+a+C99+compiler+you+can+use+'designated+initializers'+*/
struct+potNumber+bPot+=+{{[7]+=+7,+[3]+=+-12},+{[4]+=+"four",+[6]+=+"six"}};

for+(i+=+0;+i+<+20;+i%2B%2B)+{
++aPot[0].array[i]+=+i;
}
aPot[0].theName[0]+=+"Half-and-Half";
aPot[0].theName[1]+=+"Almond";
aPot[0].theName[2]+=+"Rasberry";
aPot[0].theName[3]+=+"Vanilla";
/*+...+*/

for+(i+=+0;+i+<+20;+i%2B%2B)+{
++aPot[2].array[i]+=+42+%2B+i;
}
aPot[2].theName[0]+=+"Half-and-Half";
aPot[2].theName[1]+=+"Almond";
aPot[2].theName[2]+=+"Rasberry";
aPot[2].theName[3]+=+"Vanilla";
/*+...+*/|code-block|syntax|javascript|432678|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The struct themselves do not have data. You need to create objects of the struct type and set the objects ...

<pre><code>struct potNumber {
 int array[20];
 char *theName[42];
};

/* I like to separate the type definition from the object creation */
struct potNumber aPot[3];
/* with a C99 compiler you can use 'designated initializers' */
struct potNumber bPot = {{[7] = 7, [3] = -12}, {[4] = "four", [6] = "six"}};

for (i = 0; i &lt; 20; i++) {
 aPot[0].array[i] = i;
}
aPot[0].theName[0] = "Half-and-Half";
aPot[0].theName[1] = "Almond";
aPot[0].theName[2] = "Rasberry";
aPot[0].theName[3] = "Vanilla";
/* ... */

for (i = 0; i &lt; 20; i++) {
 aPot[2].array[i] = 42 + i;
}
aPot[2].theName[0] = "Half-and-Half";
aPot[2].theName[1] = "Almond";
aPot[2].theName[2] = "Rasberry";
aPot[2].theName[3] = "Vanilla";
/* ... */
</code></pre>

blocks|key|432695|text|在C结构中，数组元素必须具有固定大小，因此char+*theNames[]无效。同样，你也不能以这种方式初始化结构。在C中，数组是静态的，也就是说，不能动态地改变它们的大小。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|432696|正确的结构声明如下所示|432697|struct+potNumber{
++++int+array[20];
++++char+theName[10][20];
};|code-block|syntax|javascript|432698|你可以这样初始化它：|432699|struct+potNumber+aPot[3]=
{
++++/*+0+*/
++++{+
++++++++{10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10+/*+up+to+20+integer+values*/+},
++++++++{"Half-and-Half",+"Almond",+"Raspberry",+"Vanilla",+/*+up+to+10+strings+of+max.+20+characters+*/+}
++++},
++++/*+1+*/
++++{+
++++++++{10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10+/*+up+to+20+integer+values*/+},
++++++++{"Half-and-Half",+"Almond",+"Raspberry",+"Vanilla",+/*+up+to+10+strings+of+max.+20+characters+*/+}
++++},
++++/*+2+*/
++++{+
++++++++{10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10,+10+/*+up+to+20+integer+values*/+},
++++++++{"Half-and-Half",+"Almond",+"Raspberry",+"Vanilla",+/*+up+to+10+strings+of+max.+20+characters+*/+}
++++}
};|432700|但是，我很确定这不是你想要的。要做到这一点，明智的方法需要一些样板代码：|432701|struct+IntArray
{
++++size_t+elements;
++++int+*data;
};

struct+String
{
++++size_t+length;
++++char+*data;
};

struct+StringArray
{
++++size_t+elements;
++++struct+String+*data;
};
/*+functions+for+convenient+allocation,+element+access+and+copying+of+Arrays+and+Strings+*/

struct+potNumber
{
++++struct+IntArray+array;
++++struct+StringArray+theNames;
};|432702|就我个人而言，我强烈建议不要使用裸C数组。通过帮助器结构和函数来做所有事情，可以让你避免缓冲区不足/溢出和其他麻烦。随着时间的推移，每一个认真的C程序员都会用这样的东西构建一个实质性的代码库。|432703|entityMap^0|L|G|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|15|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|U|3|V|5|6|7|17|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|X|$]]

In C struct array elements must have a fixed size, so the <code>char *theNames[]</code> is not valid. Also you can not initialize a struct that way. In C arrays are static, i.e. one cannot change their size dynamically.

A correct declaration of the struct would look like the following

<pre><code>struct potNumber{
 int array[20];
 char theName[10][20];
};
</code></pre>

and you initialize it like this:

<pre><code>struct potNumber aPot[3]=
{
 /* 0 */
 { 
 {10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 /* up to 20 integer values*/ },
 {"Half-and-Half", "Almond", "Raspberry", "Vanilla", /* up to 10 strings of max. 20 characters */ }
 },
 /* 1 */
 { 
 {10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 /* up to 20 integer values*/ },
 {"Half-and-Half", "Almond", "Raspberry", "Vanilla", /* up to 10 strings of max. 20 characters */ }
 },
 /* 2 */
 { 
 {10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 /* up to 20 integer values*/ },
 {"Half-and-Half", "Almond", "Raspberry", "Vanilla", /* up to 10 strings of max. 20 characters */ }
 }
};
</code></pre>

But, I'm pretty sure this is not what you want. The sane way to do this required some boilerplate code:

<pre><code>struct IntArray
{
 size_t elements;
 int *data;
};

struct String
{
 size_t length;
 char *data;
};

struct StringArray
{
 size_t elements;
 struct String *data;
};
/* functions for convenient allocation, element access and copying of Arrays and Strings */

struct potNumber
{
 struct IntArray array;
 struct StringArray theNames;
};
</code></pre>

Personally I strongly advise against using naked C arrays. Doing everything through helper structs and functions keeps you clear from buffer under/overruns and other trouble. Every serious C coder builds a substancial code library with stuff like this over time.

I want to have two arrays in a struct, which are initialized at start but need editing further on. I need three instances of the struct, so that I can index into a specific struct and modify as I wish. Is it possible?

This is what I thought I could do but I get errors:

<pre><code>struct potNumber{
 int array[20] = {[0 ... 19] = 10};
 char *theName[] = {"Half-and-Half", "Almond", "Rasberry", "Vanilla", …};
} aPot[3];
</code></pre>

Then I access the structs as follows:

<pre><code> printf("some statement %s", aPot[0].array[0]);
 aPot[0].theName[3];
 …
</code></pre>

Array in C struct

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我希望在一个结构中有两个数组，它们在开始时初始化，但需要进一步编辑。我需要这个结构的三个实例，这样我就可以索引到一个特定的结构中，并根据自己的意愿进行修改。有可能吗？这是我认为我可以做的事情，但我得到了错误：struct potNumber{    int array[20] = {[0 ... 19] = 10}; ...

问C结构中的数组
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