Pointers and Arrays

Pointer to arrays:

an array is actually very much like pointer. We can declare the arrays first element as a[0] or as int *a because a[0] is an address and *a is also an address the form ofdeclaration is equivalent. The difference is pointer is a variable and can appear on the left of the assignment operator that is lvalue. The array name is constant and cannot appear as the left side of assignment operator.

/* A program to display the contents of array using pointer*/
main()
{
int a[100];
int i,j,n;
printf(“\nEnter the elements of the array\n”);
scanf(“%d”,&n);
printf(“Enter the array elements”);
for(I=0;I< n;I++)
scanf(“%d”,&a[I]);
printf(“Array element are”);
for(ptr=a,ptr< (a+n);ptr++)
printf(“Value of a[%d]=%d stored at address %u”,j+=,*ptr,ptr);
}

Strings are characters arrays and here last element is \0 arrays and pointers to char arrays can be used to perform a number of string functions.