What is the array name in c++

The array name in C is a pointer constant pointing to the first element of the array. It represents the array address and can access, transfer and modify the array. Its essence is: 1. The array name is a pointer; 2. Points to the first element of the array; 3. The type is a pointer to the array element type; 4. It is a constant, cannot be modified, and always points to the first element.

Array name in C

In C, the array name is a pointer to the first element of the array constant. It represents the address of the entire array and can be used to access, transfer and modify the array.

Understanding the array name

• Essence: The array name is a pointer.
• Pointer to object: It points to the first element in the array.
• Type: The type of the array name is a pointer to the array element type. For example, the array name type of an int[] array is int*.
• Constant: The array name is a constant, which means that its value cannot be modified. It always points to the first element of the array.

Using array names

Array names can be used for:

• Access array elements:Use The subscript operator ([]) accesses a specific element, for example arr[0] accesses the first element.
• Pass the array: Pass the array name as a function parameter, and you can pass the entire array.
• Modify the array: When you modify the array name, you actually modify all the elements in the array.

Example

<code class="cpp">int main() {
  int arr[5] = {1, 2, 3, 4, 5};

  // 打印数组名
  cout << "数组名： " << arr << endl;

  // 通过数组名访问数组元素
  cout << "第一个元素： " << arr[0] << endl;

  // 通过数组名修改数组元素
  arr[0] = 10;
  cout << "修改后第一个元素： " << arr[0] << endl;

  return 0;
}</code>

Output:

<code>数组名： 0x7ffeee05e750
第一个元素： 1
修改后第一个元素： 10</code>

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