问题描述
通过以下声明
int array[ROW][COLUMN]={0};
我得到了所有零但具有下列之一阵列
I get the array with all zeroes but with the following one
int array[ROW][COLUMN]={1};
我不明白所有的一个值的数组。缺省值仍然是0。
I don’t get the array with all one value. The default value is still 0.
为什么这种行为，我怎么能初始化所有1？
Why this behavior and how can I initialize with all 1?
编辑：我刚才了解，使用 memset的以价值为1，将每个字节设置为1，因此每一个阵单元的实际值不会是1，但 16843009 。我该如何将它设置为1？
I have just understood that using memset with value as 1, will set each byte as 1 and hence the actual value of each array cell wont be 1 but 16843009. How do I set it to 1?
推荐答案
您得到这个行为，因为 int数组[ROW] [列] = {1} 做的不的的意思是将所有项目之一。让我试着解释这是如何工作一步一步来。
You get this behavior, because int array [ROW][COLUMN] = {1}; does not mean "set all items to one". Let me try to explain how this works step by step.
初始化阵列的明确，过于明显的方法是这样的：
The explicit, overly clear way of initializing your array would be like this:
#define ROW 2
#define COLUMN 2
int array [ROW][COLUMN] =
{
{0, 0},
{0, 0}
};
不过，C可以让你忽略了一些项目的一个数组（或结构/联合）。例如，你可以写：
However, C allows you to leave out some of the items in an array (or struct/union). You could for example write:
int array [ROW][COLUMN] =
{
{1, 2}
};
这意味着，初始化第一元件1和2，以及仿佛他们有静态存储持续时间的要素的其他部分。有在C说静态存储持续时间的所有对象，未明确由程序员初始化，必须设置为零的规则。
This means, initialize the first elements to 1 and 2, and the rest of the elements "as if they had static storage duration". There is a rule in C saying that all objects of static storage duration, that are not explicitly initialized by the programmer, must be set to zero.
因此，在上述的例子中，第一行被设置为1,2和下为0,0，因为我们没有给他们的任何显式值。
So in the above example, the first row gets set to 1,2 and the next to 0,0 since we didn't give them any explicit values.
接下来，在C允许松懈括号风格的规则。第一实例可以以及被写成
Next, there is a rule in C allowing lax brace style. The first example could as well be written as
int array [ROW][COLUMN] = {0, 0, 0, 0};
不过当然这是作风差，故难以阅读和理解。但是，这个规则是方便，因为它允许我们编写
although of course this is poor style, it is harder to read and understand. But this rule is convenient, because it allows us to write
int array [ROW][COLUMN] = {0};
这意味着：在第一行的第一列初始化为0，因为如果他们有静态存储周期，即其设置为0所有其他项目
which means: "initialize the very first column in the first row to 0, and all other items as if they had static storage duration, ie set them to zero."
因此，如果您尝试
int array [ROW][COLUMN] = {1};
它的意思是第一行中的第一列初始化为1，并设置所有其他项目零
it means "initialize the very first column in the first row to 1 and set all other items to zero".
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