When referencing an array element in C language, what is the allowed data type of its array subscript?

When referencing array elements in C language, the data type of the array subscript is allowed to be: integer constant or integer expression. C language stipulates that array elements can only be referenced one by one instead of the entire array at once. The representation of data elements is "array name [subscript]", and the subscript can be an integer constant or an integer expression.

The operating environment of this tutorial: windows7 system, c99 version, Dell G3 computer.

When referencing array elements in C language, the data type of the array subscript is allowed to be: integer constant or integer expression.

Tutorial recommendation: "c Language Tutorial Video"

There is only one-dimensional array in the array, and the size of the array must be determined as a constant at compile time. But the elements of a C array can be any type of object, and of course it can also be another array, so a multi-dimensional array is "simulated".

Array name:

Pointer to the element with index 0 in the array.

Array subscript:

C language stipulates that array elements can only be referenced one by one and not the entire array at once. The representation of data elements is "array name [subscript ]", the subscript can be an integer constant or an integer expression.

Any array subscript operation is equivalent to a corresponding pointer operation.

That is: a[i]=*(a i)=*(i a)=i[a] (The latter writing method is never recommended)

Example:

#include <stdio.h>
void main()
{
	int a[20]={0};
	*a=66;
	printf("a[0]: %d \n",a[0]);
	printf("0[a]: %d \n",0[a]);
	return;
}

The result is:

a[0]: 66
0[a]: 66

The writing is very interesting.

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