Pointer to an array in C

A pointer is a variable that stores the address of another variable. When we allocate memory for a variable, the pointer points to the address of that variable. The unary operator (*）is used to declare a variable, it returns the address of the allocated memory. A pointer to an array points to the address of the storage block of the array variable.

The following is the syntax of array pointer.

datatype　*variable_name[size];

Here,

datatype-Data type of the variable, such as int, char, float, etc.

variable_name-This is the variable name given by the user.

size-Size of array variable.

The following is an example of an array pointer.

Example

#include <stdio.h>
int main () {
　　　int　*arr[3];
　　　int　*a;
　　　printf("Value of array pointer variable: %d\n", arr);
　　　printf("Value of pointer variable: %d\n", &a);
　　　return 0;
}

Output result

Value of array pointer variable:　1481173888
Value of pointer variable:　1481173880

In the above program, an array pointer is declared* arr and integer* a.

int　*arr[3];
int　*a;

The addresses of these pointers are printed as follows:

printf("Value of array pointer variable: %d\n", arr);
printf("Value of pointer variable: %d\n", &a);