Dynamic Array

Dynamic Array

In dynamic array array the memory to Array will be allocated at run-time.

Here we will use pointers to do that.

Down below is the simple program to Delclare and Initialize a Dynamic Array.

#include<iostream>

using namespace std;

int main()

{

int *arr,i; //Line 1

arr=new int[5]; //Line 2

cout<<"\n Enter the elements : ";

for(i=0;i<5;i++)

{

cin>>*(arr+i); //Line3

}

cout<<"\n Array is : ";

for(i=0;i<5;i++)

{

cout<<" "<<*(arr+i);

}

delete arr;

return 0;

}

Explaintion :-

• Line 1- Pointer of integer type is declared.
• Line 2- Memory for storing 5 integer is allocated.

arr will contain the address of the first element in the array.

i.e, arr=&arr[0]

• Line 3- The array is being initialised like this:-

*arr=arr[0]

*(arr+1)=arr[1] = With each increment in pointer the the next address is pointed.

.

.

*(arr+4)=arr[5]

This is how Dynamic array works.

For any doubts Comment Below.