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Pointer with Array in C | One dimensional array with Pointer | Two dimensional array with pointer
Pointers are associated closely with arrays because arrays are implemented internally in the form of pointers.
One dimensional array with Pointer in C Language
Suppose we have a one dimensional array as
int a[4]={10,33,55,07};
We can refer to array elements as:
a[0] can be referred as *(a+0)
a[1] can be referred as *(a+1)
a[2] can be referred as *(a+2)
and so on..
| Program of pointers with one dimensional array |
#include<stdio.h> int main() { int a[4]={15,71,18,90}; printf("\n%u",a); /*Address of a[0]*/ printf("\n%u",&a[0]); /*Address of a[0]*/ printf("\n%d",*a); /*Value of a[0]*/ printf("\n%d",*(a+0)); /*Value of a[0]*/ printf("\n%u",(a+1)); /*Address of a[1]*/ printf("\n%d",*(a+1)); /*Value of a[1]*/ printf("\n%u",(a+2)); /*Address of a[2]*/ printf("\n%d",*(a+2)); /*Value of a[2]*/ printf("\n%u",(a+3)); /*Address of a[3]*/ printf("\n%d",*(a+3)); /*Value of a[3]*/ return(0); } |
Two dimensional array with pointer in C Language
Suppose that we have a two dimensional array initialized as
int a[2][2]={10,20,30,40};
We can also refer to array elements with the help of pointers as:
a[0][0] can be referred as *(*(a+0)+0)
a[0][1] can be referred as *(*(a+0)+1)
a[1][0] can be referred as *(*(a+1)+0)
a[1][1] can be referred as *(*(a+1)+1)
| Program Two dimensional array with pointers. |
#include<stdio.h> int main() { int arr[2][2]={10,20,30,40}; printf("\n%u",arr); /*Address of arr[0][0]*/ printf("\n%u",arr[0]); /*Address of arr[0][0]*/ printf("\n%u",&arr[0][0]); /*Address of arr[0][0]*/ printf("\n%d",*(*(arr+0)+0)); /*Value of arr[0][0]*/ printf("\n%d",*(*(arr+0)+1)); /*Value of arr[0][1]*/ printf("\n%d",*(*(arr+1)+0)); /*Value of arr[1][0]*/ printf("\n%d",*(*(arr+1)+1)); /*Value of a[1][1]*/ return(0); } |
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