Pointer and Array

nama:Raymond Filan
nim:2201734184

A.Pointer

pointeri is a variablethat saves another address of a pointer

ex:int i,*ptr,**ptr,***ptr

ptr=&i

ptr_ptr = &ptr

*ptr=5  means i=5

**ptr=9 means i=9

B.Array

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

array charactheristic

-homogeus

 means all element have similar data

-random access

 each element can be reached individually,does not have to be sequential

One dimensonal array

means just have 1 array dimension

ex: A[]

two dimensional array

means have two array dimension

ex: A[][]

pointer constant&pointer variable

pointer variable:is pointer that can be assigned with new value at run time

pointer constant:a pointer that can not be assigned with new value at run-time

Array is Pointer Constant: to its first element of the array. Array can be filled with pointer variable.