Pointer & Arrays

Pointer & Arrays

17 October 2018

Pointer Definition:

Pointer is a variable that store the address of another variable

Array Definiton:

Data saved in a certain structure to be accessed as a group or individually. Some variables saved using the same name distinguish by their index

Syntax for Pointer:

<type> *ptr_name;

Two operators mostly used in pointer : * (content of) and & (address of)

Example:

Initialize an integer pointer into a data variable:

int i, *ptr;

ptr = &i;

To assign a new value to the variable pointed by the pointer:

*ptr = 5;  /* means i=5 */

Syntax for Array:

type array_value [value_dim];

Example :

                        int A[10];

•      The definition consists of 4 components:

–     Type specified

–     Identifier (name of the array)

–     Operator index ([  ])

–     Dimensional value inside operator [ ]

Albert TG/2201736385

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