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我怎么能够使用一个固定阵列,并有一个已知的元件?
原标题:How can I use an initialize a static array with a known num of elements?
  • 时间:2011-11-23 08:59:09
  •  标签:
  • c++

I have an enum type with a last item num_of_types . (that is, it will be 15, in example) I like to have a static array_of_types[num_of_types], to easily count the number of each type I create. My idea is to have: array_of_types[the_type]++;

但是,我无意宣布和开始这一静态阵列?

最佳回答

Is this what you want?

enum MyEnum
{
Type1=0,
Type2,
Type3,
NumTypes
};


// initialize the entire array with 0
unsigned countArray[NumTypes]={0};

在你宣布阵列后,你可以像你提到的那样使用:

countArray[type]++;
问题回答

Is this what you are looking f或?

static TYPE staticArray[] = {
    VAL1,
    VAL2,
    ...
    VALN
};

static TYPE staticArray[MAX_ELEMS];

如果你不希望在分配这些阵列时先入选要素。

您不能做的是同时,既明确了内容的数量,又提供了初步清单。

你们使用它就像正常一样:

enum E
{
    A,
    N 
};

int main()
{
    int a[N];
    // Use  a ...
}

在上述例子中,可变的<代码>a被定义为具有尺寸<代码>的一系列星体。 N 。

你可以这样做:

enum Types { TYP_1, TYP_2, /*...*/ num_of_types};
class A {
    /*...*/
   static int array_of_types[num_of_types];
};


int A::array_of_types[num_of_types];

这样一来,你就将形成一个阵列,填充阵列数据类型的缺省值(无)。





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