初始化结构数组 [英] Initializing array of structures

问题描述

下面的初始化我只是在别人的问题找到。结果

Here's initialization I just found in somebody else's question.

my_data data[]={
    { .name = "Peter" },
    { .name = "James" },
    { .name = "John" },
    { .name = "Mike" }
};

我从来没有见过这样的事情之前，无法找到解释如何。名称可能是正确的。结果
我正在寻找的是如何一步一步这一过程中去。

I never saw something like this before and can't find explanation how is .name possible to be correct.
What I'm looking for is how step by step this process goes.

它看起来像它会：

1) data;
2) *data;
3) (*data).name;
4) (*data).name="Peter";

还是我完全错了？

Or am I totally wrong?

推荐答案

有只有两个在这里打球的语法。

There are only two syntaxes at play here.

1. 普通旧数组初始化：

1. Plain old array initialisation:

int x[] = {0, 0}; // x[0] = 0, x[1] = 0

A 指定初始化器即可。请参阅接受这个问题的答案：如何初始化ANSI C的结构体

A designated initialiser. See the accepted answer to this question: How to initialize a struct in ANSI C

的语法为pretty不言自明，但。您可以初始化是这样的：

The syntax is pretty self-explanatory though. You can initialise like this:

struct X {
    int a;
    int b;
}
struct X foo = { 0, 1 }; // a = 0, b = 1

或使用任何排序，

or to use any ordering,

struct X foo = { .b = 0, .a = 1 }; // a = 1, b = 0

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