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Is array name a pointer in C++?

May 01, 2024 pm 03:30 PM
c++

Yes, the array name in C is a constant pointer pointing to the first element of the array. It has the same value as the pointer to the array, but it cannot be modified or reallocated.

Is array name a pointer in C++?

#Is the array name in C a pointer?

Answer: Yes

The array name in C is a constant pointer to the first element of the array. This means that the array name and the pointer to the array have the same value, but the array name cannot be modified or reallocated.

Detailed explanation:

  • An array is a data structure used to store a set of elements of the same type.
  • The array name is an identifier used to reference the array.
  • The array name is a constant pointer, which means it points to the first element of the array and cannot be modified.
  • You can assign the array name to a pointer variable to access the array elements.

For example:

int arr[5] = {1, 2, 3, 4, 5};
int *ptr = arr;  // ptr 指向 arr 的第一个元素
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In the above example, ptr and arr point to the same memory address, i.e. arr[0].

It should be noted that:

  • The array name cannot be dereferenced (*arr) because it is a constant pointer.
  • The array name can be assigned to another pointer to the array, but cannot be re-pointed to other arrays.
  • The array name remains valid during the array life cycle, even if the elements in the array are modified.

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