Modify the program in C that copies every third element in an input array to an output array and discards all the other values to use pointer arithmetic in the

decimate_by3 function.

Modification: The decimate_by3 function should use pointer arithmeticnot subscriptingto visit array elements. In other words, eliminate the loop index variables and all use of the []operator in the function.

Example input/output #1:

Enter

the length of the array: 8

Enter the elements of the array: 3 4 7 14 9 12 8 2

Output: 3 14 8

Example input/output #2:

Enter

the length of the array: 6

Enter the elements of the array: 3 4 7 14 9 12

Output: 3 14

program that needs to be modified

#include // the decimate by 3 void function void decimate_by3(int a1[], int n, int a2[]) { //sets the parameters as for loops int i;int k=0; for(i=0;i { a2[k]=a1[i]; k++; } for(i=0;i<=n/3;i++) { printf("%d",a2[i]); printf(" ");

} } //main body of the program int main() { //defines the array as ints and sets up the scanner int n; printf("enter the length of array:"); scanf("%d",&n); int a1[n]; int a2[n/3]; int i=0; //takes the nuimbers of the array printf("Enter the elements of the array:"); for(i=0;i scanf("%d", &a1[i]); //utilizes the decimate_by3 function decimate_by3(a1,n, a2); return 0; }